87155832 has 64 divisors (see below), whose sum is σ = 232968960. Its totient is φ = 27104000.

The previous prime is 87155801. The next prime is 87155851. The reversal of 87155832 is 23855178.

It is a super-2 number, since 2×87155832² = 15192278103224448, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 20707 + ... + 24557.

It is an arithmetic number, because the mean of its divisors is an integer number (3640140).

Almost surely, 2^87155832 is an apocalyptic number.

87155832 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87155832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (116484480).

87155832 is an abundant number, since it is smaller than the sum of its proper divisors (145813128).

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

87155832 is a wasteful number, since it uses less digits than its factorization.

87155832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3924 (or 3920 counting only the distinct ones).

The product of its digits is 67200, while the sum is 39.

The square root of 87155832 is about 9335.7287878344. The cubic root of 87155832 is about 443.3691633782.

The spelling of 87155832 in words is "eighty-seven million, one hundred fifty-five thousand, eight hundred thirty-two".