16409268 has 36 divisors (see below), whose sum is σ = 41898948. Its totient is φ = 5414400.

The previous prime is 16409249. The next prime is 16409287. The reversal of 16409268 is 86290461.

16409268 is a `hidden beast` number, since 1 + 640 + 9 + 2 + 6 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (16409249) and next prime (16409287).

It can be written as a sum of positive squares in 2 ways, for example, as 6749604 + 9659664 = 2598^2 + 3108^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1380 + ... + 5892.

Almost surely, 2^16409268 is an apocalyptic number.

16409268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16409268 is an abundant number, since it is smaller than the sum of its proper divisors (25489680).

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

16409268 is a wasteful number, since it uses less digits than its factorization.

16409268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4624 (or 4619 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 16409268 is about 4050.8354693816. The cubic root of 16409268 is about 254.1146691206.

The spelling of 16409268 in words is "sixteen million, four hundred nine thousand, two hundred sixty-eight".