155944272 has 80 divisors (see below), whose sum is σ = 441543168. Its totient is φ = 47034240.

The previous prime is 155944241. The next prime is 155944277. The reversal of 155944272 is 272449551.

It is a self number, because there is not a number n which added to its sum of digits gives 155944272.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (155944277) by changing a digit.

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, 138303 + ... + 139425.

Almost surely, 2^155944272 is an apocalyptic number.

155944272 is a gapful number since it is divisible by the number (12) 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 155944272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (220771584).

155944272 is an abundant number, since it is smaller than the sum of its proper divisors (285598896).

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

155944272 is a wasteful number, since it uses less digits than its factorization.

155944272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408 (or 1402 counting only the distinct ones).

The product of its digits is 100800, while the sum is 39.

The square root of 155944272 is about 12487.7648920854. The cubic root of 155944272 is about 538.2571519348.

The spelling of 155944272 in words is "one hundred fifty-five million, nine hundred forty-four thousand, two hundred seventy-two".