158978790 has 48 divisors (see below), whose sum is σ = 415919088. Its totient is φ = 42130368.

The previous prime is 158978779. The next prime is 158978821. The reversal of 158978790 is 97879851.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9252 + ... + 20088.

It is an arithmetic number, because the mean of its divisors is an integer number (8664981).

Almost surely, 2^158978790 is an apocalyptic number.

158978790 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 158978790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (207959544).

158978790 is an abundant number, since it is smaller than the sum of its proper divisors (256940298).

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

158978790 is a wasteful number, since it uses less digits than its factorization.

158978790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11013 (or 11010 counting only the distinct ones).

The product of its (nonzero) digits is 1270080, while the sum is 54.

The square root of 158978790 is about 12608.6791536624. The cubic root of 158978790 is about 541.7260612845.

The spelling of 158978790 in words is "one hundred fifty-eight million, nine hundred seventy-eight thousand, seven hundred ninety".