87572916 has 36 divisors (see below), whose sum is σ = 234387972. Its totient is φ = 27473664.

The previous prime is 87572909. The next prime is 87572939. The reversal of 87572916 is 61927578.

It can be written as a sum of positive squares in 2 ways, for example, as 33108516 + 54464400 = 5754^2 + 7380^2 .

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 70935 + ... + 72158.

It is an arithmetic number, because the mean of its divisors is an integer number (6510777).

Almost surely, 2^87572916 is an apocalyptic number.

It is an amenable number.

87572916 is an abundant number, since it is smaller than the sum of its proper divisors (146815056).

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

87572916 is a wasteful number, since it uses less digits than its factorization.

87572916 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143120 (or 143115 counting only the distinct ones).

The product of its digits is 211680, while the sum is 45.

The square root of 87572916 is about 9358.0401794393. The cubic root of 87572916 is about 444.0752855050.

It can be divided in two parts, 87572 and 916, that added together give a palindrome (88488).

The spelling of 87572916 in words is "eighty-seven million, five hundred seventy-two thousand, nine hundred sixteen".