155340990 has 80 divisors (see below), whose sum is σ = 477382752. Its totient is φ = 35505216.

The previous prime is 155340989. The next prime is 155341003. The reversal of 155340990 is 99043551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 8029 + ... + 19368.

Almost surely, 2^155340990 is an apocalyptic number.

155340990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

155340990 is an abundant number, since it is smaller than the sum of its proper divisors (322041762).

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

155340990 is a wasteful number, since it uses less digits than its factorization.

155340990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27423 (or 27414 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 155340990 is about 12463.5865624627. The cubic root of 155340990 is about 537.5621590273.

The spelling of 155340990 in words is "one hundred fifty-five million, three hundred forty thousand, nine hundred ninety".