155089920 has 176 divisors, whose sum is σ = 518791680. Its totient is φ = 39469056.

The previous prime is 155089919. The next prime is 155089933. The reversal of 155089920 is 29980551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 353061 + ... + 353499.

It is an arithmetic number, because the mean of its divisors is an integer number (2947680).

Almost surely, 2^155089920 is an apocalyptic number.

155089920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 155089920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (259395840).

155089920 is an abundant number, since it is smaller than the sum of its proper divisors (363701760).

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

155089920 is a wasteful number, since it uses less digits than its factorization.

155089920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 490 (or 472 counting only the distinct ones).

The product of its (nonzero) digits is 32400, while the sum is 39.

The square root of 155089920 is about 12453.5103484921. The cubic root of 155089920 is about 537.2723911014.

The spelling of 155089920 in words is "one hundred fifty-five million, eighty-nine thousand, nine hundred twenty".