155090880 has 336 divisors, whose sum is σ = 626059200. Its totient is φ = 35223552.

The previous prime is 155090857. The next prime is 155090891. The reversal of 155090880 is 88090551.

It is a tau number, because it is divible by the number of its divisors (336).

It is a super-4 number, since 4×155090880⁴ (a number of 34 digits) contains 4444 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 987762 + ... + 987918.

Almost surely, 2^155090880 is an apocalyptic number.

155090880 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 155090880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313029600).

155090880 is an abundant number, since it is smaller than the sum of its proper divisors (470968320).

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

155090880 is a wasteful number, since it uses less digits than its factorization.

155090880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 174 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 36.

The square root of 155090880 is about 12453.5488917818. The cubic root of 155090880 is about 537.2734996635.

The spelling of 155090880 in words is "one hundred fifty-five million, ninety thousand, eight hundred eighty".