155998374 has 64 divisors (see below), whose sum is σ = 374685696. Its totient is φ = 42333984.

The previous prime is 155998369. The next prime is 155998429. The reversal of 155998374 is 473899551.

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, 160839 + ... + 161805.

It is an arithmetic number, because the mean of its divisors is an integer number (5854464).

Almost surely, 2^155998374 is an apocalyptic number.

155998374 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155998374, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (187342848).

155998374 is an abundant number, since it is smaller than the sum of its proper divisors (218687322).

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

155998374 is a wasteful number, since it uses less digits than its factorization.

155998374 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1169.

The product of its digits is 1360800, while the sum is 51.

The square root of 155998374 is about 12489.9309045327. The cubic root of 155998374 is about 538.3193908809.

The spelling of 155998374 in words is "one hundred fifty-five million, nine hundred ninety-eight thousand, three hundred seventy-four".