16451280 has 120 divisors (see below), whose sum is σ = 56184648. Its totient is φ = 4313088.

The previous prime is 16451251. The next prime is 16451287. The reversal of 16451280 is 8215461.

16451280 is a `hidden beast` number, since 1 + 645 + 12 + 8 + 0 = 666.

16451280 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 144 + 16451136 = 12^2 + 4056^2 .

It is a tau number, because it is divible by the number of its divisors (120).

It is a super-2 number, since 2×16451280² = 541289227276800, which contains 22 as substring.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16451287) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 52404 + ... + 52716.

Almost surely, 2^16451280 is an apocalyptic number.

16451280 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16451280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28092324).

16451280 is an abundant number, since it is smaller than the sum of its proper divisors (39733368).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16451280 is a wasteful number, since it uses less digits than its factorization.

16451280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 405 (or 396 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 27.

The square root of 16451280 is about 4056.0177514404. The cubic root of 16451280 is about 254.3313508848.

The spelling of 16451280 in words is "sixteen million, four hundred fifty-one thousand, two hundred eighty".