155670720 has 112 divisors (see below), whose sum is σ = 497726208. Its totient is φ = 41221120.

The previous prime is 155670703. The next prime is 155670731. The reversal of 155670720 is 27076551.

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 15 ways as a sum of consecutive naturals, for example, 159835 + ... + 160805.

It is an arithmetic number, because the mean of its divisors is an integer number (4443984).

Almost surely, 2^155670720 is an apocalyptic number.

155670720 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 155670720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248863104).

155670720 is an abundant number, since it is smaller than the sum of its proper divisors (342055488).

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

155670720 is a wasteful number, since it uses less digits than its factorization.

155670720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1158 (or 1148 counting only the distinct ones).

The product of its (nonzero) digits is 14700, while the sum is 33.

The square root of 155670720 is about 12476.8072839168. The cubic root of 155670720 is about 537.9422370879.

The spelling of 155670720 in words is "one hundred fifty-five million, six hundred seventy thousand, seven hundred twenty".