921750072 has 32 divisors (see below), whose sum is σ = 2305914000. Its totient is φ = 307044864.

The previous prime is 921750043. The next prime is 921750101. The reversal of 921750072 is 270057129.

921750072 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (921750043) and next prime (921750101).

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, 26304 + ... + 50352.

Almost surely, 2^921750072 is an apocalyptic number.

It is an amenable number.

921750072 is an abundant number, since it is smaller than the sum of its proper divisors (1384163928).

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

921750072 is a wasteful number, since it uses less digits than its factorization.

921750072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25655 (or 25651 counting only the distinct ones).

The product of its (nonzero) digits is 8820, while the sum is 33.

The square root of 921750072 is about 30360.3371522781. The cubic root of 921750072 is about 973.2051386597.

The spelling of 921750072 in words is "nine hundred twenty-one million, seven hundred fifty thousand, seventy-two".