87879438 has 32 divisors (see below), whose sum is σ = 198604800. Its totient is φ = 28795608.

The previous prime is 87879413. The next prime is 87879457. The reversal of 87879438 is 83497878.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10606 + ... + 16977.

It is an arithmetic number, because the mean of its divisors is an integer number (6206400).

Almost surely, 2^87879438 is an apocalyptic number.

87879438 is an abundant number, since it is smaller than the sum of its proper divisors (110725362).

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

87879438 is a wasteful number, since it uses less digits than its factorization.

87879438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27653 (or 27647 counting only the distinct ones).

The product of its digits is 2709504, while the sum is 54.

The square root of 87879438 is about 9374.4033410132. The cubic root of 87879438 is about 444.5927983958.

It can be divided in two parts, 8787 and 9438, that added together give a square (18225 = 135²).

The spelling of 87879438 in words is "eighty-seven million, eight hundred seventy-nine thousand, four hundred thirty-eight".