16400790 has 72 divisors (see below), whose sum is σ = 49617360. Its totient is φ = 3747744.

The previous prime is 16400789. The next prime is 16400809. The reversal of 16400790 is 9700461.

16400790 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 an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 2551 + ... + 6269.

It is an arithmetic number, because the mean of its divisors is an integer number (689130).

Almost surely, 2^16400790 is an apocalyptic number.

16400790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 16400790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (24808680).

16400790 is an abundant number, since it is smaller than the sum of its proper divisors (33216570).

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

16400790 is a wasteful number, since it uses less digits than its factorization.

16400790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3746 (or 3736 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 16400790 is about 4049.7888833864. The cubic root of 16400790 is about 254.0708980172.

The spelling of 16400790 in words is "sixteen million, four hundred thousand, seven hundred ninety".