87782538 has 16 divisors (see below), whose sum is σ = 178443936. Its totient is φ = 28781040.

The previous prime is 87782521. The next prime is 87782551. The reversal of 87782538 is 83528778.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 119556 + ... + 120287.

It is an arithmetic number, because the mean of its divisors is an integer number (11152746).

Almost surely, 2^87782538 is an apocalyptic number.

87782538 is an abundant number, since it is smaller than the sum of its proper divisors (90661398).

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

87782538 is a wasteful number, since it uses less digits than its factorization.

87782538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 239909.

The product of its digits is 752640, while the sum is 48.

The square root of 87782538 is about 9369.2335865854. The cubic root of 87782538 is about 444.4293286572.

The spelling of 87782538 in words is "eighty-seven million, seven hundred eighty-two thousand, five hundred thirty-eight".