76897728 has 56 divisors (see below), whose sum is σ = 226070160. Its totient is φ = 25632000.

The previous prime is 76897721. The next prime is 76897739. The reversal of 76897728 is 82779867.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (76897721) 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, 20523 + ... + 23978.

Almost surely, 2^76897728 is an apocalyptic number.

It is an amenable number.

76897728 is an abundant number, since it is smaller than the sum of its proper divisors (149172432).

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

76897728 is a wasteful number, since it uses less digits than its factorization.

76897728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44522 (or 44506 counting only the distinct ones).

The product of its digits is 2370816, while the sum is 54.

The square root of 76897728 is about 8769.1349630394. The cubic root of 76897728 is about 425.2436489880.

The spelling of 76897728 in words is "seventy-six million, eight hundred ninety-seven thousand, seven hundred twenty-eight".