155875428 has 30 divisors (see below), whose sum is σ = 407490006. Its totient is φ = 51958368.

The previous prime is 155875427. The next prime is 155875429. The reversal of 155875428 is 824578551.

155875428 is a `hidden beast` number, since 1 + 558 + 75 + 4 + 28 = 666.

It is an interprime number because it is at equal distance from previous prime (155875427) and next prime (155875429).

It can be written as a sum of positive squares in only one way, i.e., 118200384 + 37675044 = 10872^2 + 6138^2 .

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (155875427) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 240225 + ... + 240872.

Almost surely, 2^155875428 is an apocalyptic number.

155875428 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

155875428 is an abundant number, since it is smaller than the sum of its proper divisors (251614578).

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

155875428 is a wasteful number, since it uses less digits than its factorization.

155875428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 481113 (or 481102 counting only the distinct ones).

The product of its digits is 448000, while the sum is 45.

The square root of 155875428 is about 12485.0081297531. The cubic root of 155875428 is about 538.1779329737.

The spelling of 155875428 in words is "one hundred fifty-five million, eight hundred seventy-five thousand, four hundred twenty-eight".