921198072 has 32 divisors (see below), whose sum is σ = 2304362880. Its totient is φ = 306883680.

The previous prime is 921198037. The next prime is 921198101. The reversal of 921198072 is 270891129.

It is a self number, because there is not a number n which added to its sum of digits gives 921198072.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33463 + ... + 54425.

It is an arithmetic number, because the mean of its divisors is an integer number (72011340).

Almost surely, 2^921198072 is an apocalyptic number.

It is an amenable number.

921198072 is an abundant number, since it is smaller than the sum of its proper divisors (1383164808).

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

921198072 is a wasteful number, since it uses less digits than its factorization.

921198072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22803 (or 22799 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 39.

The square root of 921198072 is about 30351.2449827021. The cubic root of 921198072 is about 973.0108283918.

The spelling of 921198072 in words is "nine hundred twenty-one million, one hundred ninety-eight thousand, seventy-two".