16931072 has 18 divisors (see below), whose sum is σ = 33796518. Its totient is φ = 8465408.

The previous prime is 16931069. The next prime is 16931077. The reversal of 16931072 is 27013961.

It can be written as a sum of positive squares in only one way, i.e., 16128256 + 802816 = 4016^2 + 896^2 .

It is a super-2 number, since 2×16931072² = 573322398138368, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (16931077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32813 + ... + 33324.

Almost surely, 2^16931072 is an apocalyptic number.

It is an amenable number.

16931072 is a deficient number, since it is larger than the sum of its proper divisors (16865446).

16931072 is an frugal number, since it uses more digits than its factorization.

16931072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66153 (or 66139 counting only the distinct ones).

The product of its (nonzero) digits is 2268, while the sum is 29.

The square root of 16931072 is about 4114.7383877958. The cubic root of 16931072 is about 256.7801720570.

The spelling of 16931072 in words is "sixteen million, nine hundred thirty-one thousand, seventy-two".