87764328 has 24 divisors (see below), whose sum is σ = 237695250. Its totient is φ = 29254752.

The previous prime is 87764321. The next prime is 87764351. The reversal of 87764328 is 82346778.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 80245764 + 7518564 = 8958^2 + 2742^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is not an unprimeable number, because it can be changed into a prime (87764321) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 609403 + ... + 609546.

Almost surely, 2^87764328 is an apocalyptic number.

It is an amenable number.

87764328 is an abundant number, since it is smaller than the sum of its proper divisors (149930922).

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

87764328 is a wasteful number, since it uses less digits than its factorization.

87764328 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1218961 (or 1218954 counting only the distinct ones).

The product of its digits is 451584, while the sum is 45.

The square root of 87764328 is about 9368.2617384443. The cubic root of 87764328 is about 444.3985950666.

The spelling of 87764328 in words is "eighty-seven million, seven hundred sixty-four thousand, three hundred twenty-eight".