16400956 has 48 divisors (see below), whose sum is σ = 34419168. Its totient is φ = 6739200.

The previous prime is 16400939. The next prime is 16400959. The reversal of 16400956 is 65900461.

16400956 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16400959) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 30046 + ... + 30586.

It is an arithmetic number, because the mean of its divisors is an integer number (717066).

Almost surely, 2^16400956 is an apocalyptic number.

It is an amenable number.

16400956 is an abundant number, since it is smaller than the sum of its proper divisors (18018212).

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

16400956 is a wasteful number, since it uses less digits than its factorization.

16400956 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 622 (or 620 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 31.

The square root of 16400956 is about 4049.8093782300. The cubic root of 16400956 is about 254.0717552041.

The spelling of 16400956 in words is "sixteen million, four hundred thousand, nine hundred fifty-six".