155749398 has 16 divisors (see below), whose sum is σ = 355998720. Its totient is φ = 44499816.

The previous prime is 155749381. The next prime is 155749421. The reversal of 155749398 is 893947551.

It is a self number, because there is not a number n which added to its sum of digits gives 155749398.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1854118 + ... + 1854201.

It is an arithmetic number, because the mean of its divisors is an integer number (22249920).

Almost surely, 2^155749398 is an apocalyptic number.

155749398 is an abundant number, since it is smaller than the sum of its proper divisors (200249322).

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

155749398 is a wasteful number, since it uses less digits than its factorization.

155749398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3708331.

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

The square root of 155749398 is about 12479.9598557047. The cubic root of 155749398 is about 538.0328494842.

The spelling of 155749398 in words is "one hundred fifty-five million, seven hundred forty-nine thousand, three hundred ninety-eight".