155070720 has 288 divisors, whose sum is σ = 629879040. Its totient is φ = 35389440.

The previous prime is 155070709. The next prime is 155070731. The reversal of 155070720 is 27070551.

It is an interprime number because it is at equal distance from previous prime (155070709) and next prime (155070731).

It is a tau number, because it is divible by the number of its divisors (288).

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 241600 + ... + 242240.

It is an arithmetic number, because the mean of its divisors is an integer number (2187080).

Almost surely, 2^155070720 is an apocalyptic number.

155070720 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 155070720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314939520).

155070720 is an abundant number, since it is smaller than the sum of its proper divisors (474808320).

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

155070720 is an equidigital number, since it uses as much as digits as its factorization.

155070720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 678 (or 658 counting only the distinct ones).

The product of its (nonzero) digits is 2450, while the sum is 27.

The square root of 155070720 is about 12452.7394576455. The cubic root of 155070720 is about 537.2502188983.

The spelling of 155070720 in words is "one hundred fifty-five million, seventy thousand, seven hundred twenty".