155724480 has 168 divisors, whose sum is σ = 540867600. Its totient is φ = 41121792.

The previous prime is 155724469. The next prime is 155724493. The reversal of 155724480 is 84427551.

155724480 is a `hidden beast` number, since 1 + 5 + 572 + 4 + 4 + 80 = 666.

It is a super-2 number, since 2×155724480² = 48500227342540800, which contains 22 as substring.

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

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 400126 + ... + 400514.

It is an arithmetic number, because the mean of its divisors is an integer number (3219450).

Almost surely, 2^155724480 is an apocalyptic number.

155724480 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 155724480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270433800).

155724480 is an abundant number, since it is smaller than the sum of its proper divisors (385143120).

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

155724480 is a wasteful number, since it uses less digits than its factorization.

155724480 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 551 (or 538 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 36.

The square root of 155724480 is about 12478.9614952527. The cubic root of 155724480 is about 538.0041550607.

The spelling of 155724480 in words is "one hundred fifty-five million, seven hundred twenty-four thousand, four hundred eighty".