155840398 has 16 divisors (see below), whose sum is σ = 268860384. Its totient is φ = 66362400.

The previous prime is 155840389. The next prime is 155840407. The reversal of 155840398 is 893048551.

It is an interprime number because it is at equal distance from previous prime (155840389) and next prime (155840407).

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, 33253 + ... + 37648.

It is an arithmetic number, because the mean of its divisors is an integer number (16803774).

Almost surely, 2^155840398 is an apocalyptic number.

155840398 is a deficient number, since it is larger than the sum of its proper divisors (113019986).

155840398 is a wasteful number, since it uses less digits than its factorization.

155840398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71067.

The product of its (nonzero) digits is 172800, while the sum is 43.

The square root of 155840398 is about 12483.6051683798. The cubic root of 155840398 is about 538.1376149119.

The spelling of 155840398 in words is "one hundred fifty-five million, eight hundred forty thousand, three hundred ninety-eight".