16061440 has 44 divisors (see below), whose sum is σ = 38540916. Its totient is φ = 6422528.

The previous prime is 16061399. The next prime is 16061443. The reversal of 16061440 is 4416061.

It can be written as a sum of positive squares in 2 ways, for example, as 12616704 + 3444736 = 3552^2 + 1856^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16061443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3552 + ... + 6688.

Almost surely, 2^16061440 is an apocalyptic number.

16061440 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 16061440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (19270458).

16061440 is an abundant number, since it is smaller than the sum of its proper divisors (22479476).

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

16061440 is an equidigital number, since it uses as much as digits as its factorization.

16061440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3162 (or 3144 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 16061440 is about 4007.6726413219. The cubic root of 16061440 is about 252.3063377953.

The spelling of 16061440 in words is "sixteen million, sixty-one thousand, four hundred forty".