155970390 has 48 divisors (see below), whose sum is σ = 378442512. Its totient is φ = 41139456.

The previous prime is 155970379. The next prime is 155970391. The reversal of 155970390 is 93079551.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155970391) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 562932 + ... + 563208.

It is an arithmetic number, because the mean of its divisors is an integer number (7884219).

Almost surely, 2^155970390 is an apocalyptic number.

155970390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155970390 is an abundant number, since it is smaller than the sum of its proper divisors (222472122).

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

155970390 is a wasteful number, since it uses less digits than its factorization.

155970390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 561 (or 424 counting only the distinct ones).

The product of its (nonzero) digits is 42525, while the sum is 39.

The square root of 155970390 is about 12488.8105918858. The cubic root of 155970390 is about 538.2871998815.

The spelling of 155970390 in words is "one hundred fifty-five million, nine hundred seventy thousand, three hundred ninety".