118978590 has 64 divisors (see below), whose sum is σ = 297561600. Its totient is φ = 30409344.

The previous prime is 118978583. The next prime is 118978621. The reversal of 118978590 is 95879811.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 141391 + ... + 142229.

It is an arithmetic number, because the mean of its divisors is an integer number (4649400).

Almost surely, 2^118978590 is an apocalyptic number.

118978590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 118978590, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148780800).

118978590 is an abundant number, since it is smaller than the sum of its proper divisors (178583010).

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

118978590 is a wasteful number, since it uses less digits than its factorization.

118978590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1041.

The product of its (nonzero) digits is 181440, while the sum is 48.

The square root of 118978590 is about 10907.7307447516. The cubic root of 118978590 is about 491.8389733460.

The spelling of 118978590 in words is "one hundred eighteen million, nine hundred seventy-eight thousand, five hundred ninety".