16400268 has 36 divisors (see below), whose sum is σ = 43639960. Its totient is φ = 5178816.

The previous prime is 16400233. The next prime is 16400269. The reversal of 16400268 is 86200461.

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

It is not an unprimeable number, because it can be changed into a prime (16400269) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11305 + ... + 12672.

Almost surely, 2^16400268 is an apocalyptic number.

16400268 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

16400268 is an abundant number, since it is smaller than the sum of its proper divisors (27239692).

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

16400268 is a wasteful number, since it uses less digits than its factorization.

16400268 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24006 (or 24001 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 16400268 is about 4049.7244350696. The cubic root of 16400268 is about 254.0682024882.

The spelling of 16400268 in words is "sixteen million, four hundred thousand, two hundred sixty-eight".