155440560 has 160 divisors (see below), whose sum is σ = 531965952. Its totient is φ = 37232640.

The previous prime is 155440559. The next prime is 155440567. The reversal of 155440560 is 65044551.

It is a super-2 number, since 2×155440560² = 48323535386227200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is not an unprimeable number, because it can be changed into a prime (155440567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 255777 + ... + 256383.

Almost surely, 2^155440560 is an apocalyptic number.

155440560 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 155440560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (265982976).

155440560 is an abundant number, since it is smaller than the sum of its proper divisors (376525392).

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

155440560 is a wasteful number, since it uses less digits than its factorization.

155440560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 731 (or 725 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 30.

The square root of 155440560 is about 12467.5803586743. The cubic root of 155440560 is about 537.6769894876.

The spelling of 155440560 in words is "one hundred fifty-five million, four hundred forty thousand, five hundred sixty".