158117904 has 90 divisors (see below), whose sum is σ = 514780110. Its totient is φ = 45174528.

The previous prime is 158117891. The next prime is 158117951. The reversal of 158117904 is 409711851.

158117904 is a `hidden beast` number, since 1 + 581 + 1 + 79 + 0 + 4 = 666.

It can be written as a sum of positive squares in only one way, i.e., 138297600 + 19820304 = 11760^2 + 4452^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 4149 + ... + 18260.

It is an arithmetic number, because the mean of its divisors is an integer number (5719779).

Almost surely, 2^158117904 is an apocalyptic number.

158117904 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 158117904, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (257390055).

158117904 is an abundant number, since it is smaller than the sum of its proper divisors (356662206).

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

158117904 is a wasteful number, since it uses less digits than its factorization.

158117904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22437 (or 22421 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 36.

The square root of 158117904 is about 12574.4941846581. The cubic root of 158117904 is about 540.7464573872.

The spelling of 158117904 in words is "one hundred fifty-eight million, one hundred seventeen thousand, nine hundred four".