87765328 has 20 divisors (see below), whose sum is σ = 194337760. Its totient is φ = 37613664.

The previous prime is 87765299. The next prime is 87765421. The reversal of 87765328 is 82356778.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 391698 + ... + 391921.

It is an arithmetic number, because the mean of its divisors is an integer number (9716888).

Almost surely, 2^87765328 is an apocalyptic number.

It is an amenable number.

87765328 is an abundant number, since it is smaller than the sum of its proper divisors (106572432).

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

87765328 is a wasteful number, since it uses less digits than its factorization.

87765328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 783634 (or 783628 counting only the distinct ones).

The product of its digits is 564480, while the sum is 46.

The square root of 87765328 is about 9368.3151099864. The cubic root of 87765328 is about 444.4002829084.

The spelling of 87765328 in words is "eighty-seven million, seven hundred sixty-five thousand, three hundred twenty-eight".