155652390 has 96 divisors (see below), whose sum is σ = 417021696. Its totient is φ = 40265280.

The previous prime is 155652337. The next prime is 155652421. The reversal of 155652390 is 93256551.

155652390 is a `hidden beast` number, since 1 + 5 + 565 + 2 + 3 + 90 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 500335 + ... + 500645.

It is an arithmetic number, because the mean of its divisors is an integer number (4343976).

Almost surely, 2^155652390 is an apocalyptic number.

155652390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 155652390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (208510848).

155652390 is an abundant number, since it is smaller than the sum of its proper divisors (261369306).

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

155652390 is a wasteful number, since it uses less digits than its factorization.

155652390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 474 (or 471 counting only the distinct ones).

The product of its (nonzero) digits is 40500, while the sum is 36.

The square root of 155652390 is about 12476.0726993714. The cubic root of 155652390 is about 537.9211222881.

It can be divided in two parts, 15565 and 2390, that added together give a triangular number (17955 = T₁₈₉).

The spelling of 155652390 in words is "one hundred fifty-five million, six hundred fifty-two thousand, three hundred ninety".