155817480 has 256 divisors, whose sum is σ = 606412800. Its totient is φ = 31104000.

The previous prime is 155817469. The next prime is 155817481. The reversal of 155817480 is 84718551.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (155817481) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 207105 + ... + 207855.

It is an arithmetic number, because the mean of its divisors is an integer number (2368800).

Almost surely, 2^155817480 is an apocalyptic number.

155817480 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 155817480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (303206400).

155817480 is an abundant number, since it is smaller than the sum of its proper divisors (450595320).

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

155817480 is a wasteful number, since it uses less digits than its factorization.

155817480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 804 (or 800 counting only the distinct ones).

The product of its (nonzero) digits is 44800, while the sum is 39.

The square root of 155817480 is about 12482.6872106931. The cubic root of 155817480 is about 538.1112339849. Note that the first 3 decimals are identical.

The spelling of 155817480 in words is "one hundred fifty-five million, eight hundred seventeen thousand, four hundred eighty".