155305080 has 128 divisors (see below), whose sum is σ = 591667200. Its totient is φ = 35496576.

The previous prime is 155305079. The next prime is 155305093. The reversal of 155305080 is 80503551.

155305080 is a `hidden beast` number, since 1 + 5 + 530 + 50 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

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 31 ways as a sum of consecutive naturals, for example, 2712 + ... + 17831.

It is an arithmetic number, because the mean of its divisors is an integer number (4622400).

Almost surely, 2^155305080 is an apocalyptic number.

155305080 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 155305080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (295833600).

155305080 is an abundant number, since it is smaller than the sum of its proper divisors (436362120).

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

155305080 is a wasteful number, since it uses less digits than its factorization.

155305080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20570 (or 20560 counting only the distinct ones).

The product of its (nonzero) digits is 3000, while the sum is 27.

The square root of 155305080 is about 12462.1458826319. The cubic root of 155305080 is about 537.5207332907.

The spelling of 155305080 in words is "one hundred fifty-five million, three hundred five thousand, eighty".