87158756 has 6 divisors (see below), whose sum is σ = 152527830. Its totient is φ = 43579376.

The previous prime is 87158741. The next prime is 87158767. The reversal of 87158756 is 65785178.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 67798756 + 19360000 = 8234^2 + 4400^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 87158756.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10894841 + ... + 10894848.

It is an arithmetic number, because the mean of its divisors is an integer number (25421305).

Almost surely, 2^87158756 is an apocalyptic number.

It is an amenable number.

87158756 is a deficient number, since it is larger than the sum of its proper divisors (65369074).

87158756 is a wasteful number, since it uses less digits than its factorization.

87158756 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21789693 (or 21789691 counting only the distinct ones).

The product of its digits is 470400, while the sum is 47.

The square root of 87158756 is about 9335.8853891851. The cubic root of 87158756 is about 443.3741215354.

It can be divided in two parts, 8715 and 8756, that added together give a palindrome (17471).

The spelling of 87158756 in words is "eighty-seven million, one hundred fifty-eight thousand, seven hundred fifty-six".