155757228 has 24 divisors (see below), whose sum is σ = 396473280. Its totient is φ = 47199120.

The previous prime is 155757221. The next prime is 155757233. The reversal of 155757228 is 822757551.

It is a self number, because there is not a number n which added to its sum of digits gives 155757228.

It is not an unprimeable number, because it can be changed into a prime (155757221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 589858 + ... + 590121.

It is an arithmetic number, because the mean of its divisors is an integer number (16519720).

Almost surely, 2^155757228 is an apocalyptic number.

It is an amenable number.

155757228 is an abundant number, since it is smaller than the sum of its proper divisors (240716052).

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

155757228 is a wasteful number, since it uses less digits than its factorization.

155757228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1179997 (or 1179995 counting only the distinct ones).

The product of its digits is 196000, while the sum is 42.

The square root of 155757228 is about 12480.2735546942. The cubic root of 155757228 is about 538.0418655204.

It can be divided in two parts, 1557 and 57228, that added together give a palindrome (58785).

The spelling of 155757228 in words is "one hundred fifty-five million, seven hundred fifty-seven thousand, two hundred twenty-eight".