87239732 has 12 divisors (see below), whose sum is σ = 153343680. Its totient is φ = 43427256.

The previous prime is 87239731. The next prime is 87239741. The reversal of 87239732 is 23793278.

It is a super-2 number, since 2×87239732² = 15221541678863648, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 87239732.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87239731) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47132 + ... + 48947.

It is an arithmetic number, because the mean of its divisors is an integer number (12778640).

Almost surely, 2^87239732 is an apocalyptic number.

It is an amenable number.

87239732 is a deficient number, since it is larger than the sum of its proper divisors (66103948).

87239732 is a wasteful number, since it uses less digits than its factorization.

87239732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 96310 (or 96308 counting only the distinct ones).

The product of its digits is 127008, while the sum is 41.

The square root of 87239732 is about 9340.2211965242. The cubic root of 87239732 is about 443.5113865739.

It can be divided in two parts, 872 and 39732, that added together give a palindrome (40604).

The spelling of 87239732 in words is "eighty-seven million, two hundred thirty-nine thousand, seven hundred thirty-two".