69820728 has 32 divisors (see below), whose sum is σ = 175165200. Its totient is φ = 23191808.

The previous prime is 69820693. The next prime is 69820733. The reversal of 69820728 is 82702896.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 69820728.

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, 2068 + ... + 11996.

Almost surely, 2^69820728 is an apocalyptic number.

It is an amenable number.

69820728 is an abundant number, since it is smaller than the sum of its proper divisors (105344472).

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

69820728 is a wasteful number, since it uses less digits than its factorization.

69820728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10231 (or 10227 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 42.

The square root of 69820728 is about 8355.8798459528. The cubic root of 69820728 is about 411.7764048953.

The spelling of 69820728 in words is "sixty-nine million, eight hundred twenty thousand, seven hundred twenty-eight".