87507764 has 6 divisors (see below), whose sum is σ = 153138594. Its totient is φ = 43753880.

The previous prime is 87507757. The next prime is 87507769. The reversal of 87507764 is 46770578.

It can be written as a sum of positive squares in only one way, i.e., 87422500 + 85264 = 9350^2 + 292^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87507769) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10938467 + ... + 10938474.

It is an arithmetic number, because the mean of its divisors is an integer number (25523099).

Almost surely, 2^87507764 is an apocalyptic number.

It is an amenable number.

87507764 is a deficient number, since it is larger than the sum of its proper divisors (65630830).

87507764 is a wasteful number, since it uses less digits than its factorization.

87507764 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21876945 (or 21876943 counting only the distinct ones).

The product of its (nonzero) digits is 329280, while the sum is 44.

The square root of 87507764 is about 9354.5584609857. The cubic root of 87507764 is about 443.9651313147.

The spelling of 87507764 in words is "eighty-seven million, five hundred seven thousand, seven hundred sixty-four".