16972840 has 32 divisors (see below), whose sum is σ = 38388960. Its totient is φ = 6753600.

The previous prime is 16972829. The next prime is 16972847. The reversal of 16972840 is 4827961.

It is a self number, because there is not a number n which added to its sum of digits gives 16972840.

It is not an unprimeable number, because it can be changed into a prime (16972847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7435 + ... + 9445.

It is an arithmetic number, because the mean of its divisors is an integer number (1199655).

Almost surely, 2^16972840 is an apocalyptic number.

16972840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

16972840 is an abundant number, since it is smaller than the sum of its proper divisors (21416120).

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

16972840 is a wasteful number, since it uses less digits than its factorization.

16972840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2233 (or 2229 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 16972840 is about 4119.8106752617. The cubic root of 16972840 is about 256.9911527283.

The spelling of 16972840 in words is "sixteen million, nine hundred seventy-two thousand, eight hundred forty".