16156404 has 54 divisors (see below), whose sum is σ = 44902130. Its totient is φ = 4894560.

The previous prime is 16156379. The next prime is 16156423. The reversal of 16156404 is 40465161.

16156404 is a `hidden beast` number, since 1 + 6 + 15 + 640 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 12236004 + 3920400 = 3498^2 + 1980^2 .

It is a super-2 number, since 2×16156404² = 522058780422432, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 2502 + ... + 6210.

Almost surely, 2^16156404 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 16156404, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (22451065).

16156404 is an abundant number, since it is smaller than the sum of its proper divisors (28745726).

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

16156404 is a wasteful number, since it uses less digits than its factorization.

16156404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3741 (or 3725 counting only the distinct ones).

The product of its (nonzero) digits is 2880, while the sum is 27.

The square root of 16156404 is about 4019.5029543465. The cubic root of 16156404 is about 252.8026185770.

It can be divided in two parts, 161 and 56404, that added together give a palindrome (56565).

The spelling of 16156404 in words is "sixteen million, one hundred fifty-six thousand, four hundred four".