87773928 has 32 divisors (see below), whose sum is σ = 239384160. Its totient is φ = 26598080.

The previous prime is 87773909. The next prime is 87773929. The reversal of 87773928 is 82937778.

It is not an unprimeable number, because it can be changed into a prime (87773929) 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, 165975 + ... + 166502.

It is an arithmetic number, because the mean of its divisors is an integer number (7480755).

Almost surely, 2^87773928 is an apocalyptic number.

87773928 is a gapful number since it is divisible by the number (88) formed by its first and last digit.

It is an amenable number.

87773928 is an abundant number, since it is smaller than the sum of its proper divisors (151610232).

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

87773928 is a wasteful number, since it uses less digits than its factorization.

87773928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 332497 (or 332493 counting only the distinct ones).

The product of its digits is 1185408, while the sum is 51.

The square root of 87773928 is about 9368.7740926975. The cubic root of 87773928 is about 444.4147978188.

The spelling of 87773928 in words is "eighty-seven million, seven hundred seventy-three thousand, nine hundred twenty-eight".