87455538 has 20 divisors (see below), whose sum is σ = 195965550. Its totient is φ = 29151792.

The previous prime is 87455521. The next prime is 87455551. The reversal of 87455538 is 83555478.

It can be written as a sum of positive squares in only one way, i.e., 66634569 + 20820969 = 8163^2 + 4563^2 .

It is a super-2 number, since 2×87455538² = 15296942253738888, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 87455493 and 87455502.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 269763 + ... + 270086.

Almost surely, 2^87455538 is an apocalyptic number.

87455538 is an abundant number, since it is smaller than the sum of its proper divisors (108510012).

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

87455538 is a wasteful number, since it uses less digits than its factorization.

87455538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 539863 (or 539854 counting only the distinct ones).

The product of its digits is 672000, while the sum is 45.

The square root of 87455538 is about 9351.7665710816. The cubic root of 87455538 is about 443.8767919640.

It can be divided in two parts, 87 and 455538, that added together give a square (455625 = 675²).

The spelling of 87455538 in words is "eighty-seven million, four hundred fifty-five thousand, five hundred thirty-eight".