87879978 has 96 divisors (see below), whose sum is σ = 215255040. Its totient is φ = 26768880.

The previous prime is 87879977. The next prime is 87880007. The reversal of 87879978 is 87997878.

It is not an unprimeable number, because it can be changed into a prime (87879977) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 286101 + ... + 286407.

It is an arithmetic number, because the mean of its divisors is an integer number (2242240).

Almost surely, 2^87879978 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 87879978, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107627520).

87879978 is an abundant number, since it is smaller than the sum of its proper divisors (127375062).

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

87879978 is a wasteful number, since it uses less digits than its factorization.

87879978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374 (or 362 counting only the distinct ones).

The product of its digits is 14224896, while the sum is 63.

The square root of 87879978 is about 9374.4321428020. The cubic root of 87879978 is about 444.5937090359.

The spelling of 87879978 in words is "eighty-seven million, eight hundred seventy-nine thousand, nine hundred seventy-eight".