16831972 has 12 divisors (see below), whose sum is σ = 31188780. Its totient is φ = 7920896.

The previous prime is 16831943. The next prime is 16831973. The reversal of 16831972 is 27913861.

It can be written as a sum of positive squares in 2 ways, for example, as 12278016 + 4553956 = 3504^2 + 2134^2 .

It is not an unprimeable number, because it can be changed into a prime (16831973) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 123697 + ... + 123832.

It is an arithmetic number, because the mean of its divisors is an integer number (2599065).

Almost surely, 2^16831972 is an apocalyptic number.

It is an amenable number.

16831972 is a deficient number, since it is larger than the sum of its proper divisors (14356808).

16831972 is a wasteful number, since it uses less digits than its factorization.

16831972 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 247550 (or 247548 counting only the distinct ones).

The product of its digits is 18144, while the sum is 37.

The square root of 16831972 is about 4102.6786371833. The cubic root of 16831972 is about 256.2782009812.

It can be divided in two parts, 1683 and 1972, that added together give a triangular number (3655 = T₈₅).

The spelling of 16831972 in words is "sixteen million, eight hundred thirty-one thousand, nine hundred seventy-two".