155798538 has 24 divisors (see below), whose sum is σ = 362470752. Its totient is φ = 44513784.

The previous prime is 155798501. The next prime is 155798543. The reversal of 155798538 is 835897551.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 264670 + ... + 265257.

It is an arithmetic number, because the mean of its divisors is an integer number (15102948).

Almost surely, 2^155798538 is an apocalyptic number.

155798538 is an abundant number, since it is smaller than the sum of its proper divisors (206672214).

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

155798538 is a wasteful number, since it uses less digits than its factorization.

155798538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 529946 (or 529939 counting only the distinct ones).

The product of its digits is 1512000, while the sum is 51.

The square root of 155798538 is about 12481.9284567730. The cubic root of 155798538 is about 538.0894278819.

The spelling of 155798538 in words is "one hundred fifty-five million, seven hundred ninety-eight thousand, five hundred thirty-eight".