155928420 has 72 divisors (see below), whose sum is σ = 500815224. Its totient is φ = 39134208.

The previous prime is 155928407. The next prime is 155928439. The reversal of 155928420 is 24829551.

155928420 is a `hidden beast` number, since 1 + 559 + 2 + 84 + 20 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 58155876 + 97772544 = 7626^2 + 9888^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22419 + ... + 28538.

It is an arithmetic number, because the mean of its divisors is an integer number (6955767).

Almost surely, 2^155928420 is an apocalyptic number.

155928420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155928420 is an abundant number, since it is smaller than the sum of its proper divisors (344886804).

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

155928420 is a wasteful number, since it uses less digits than its factorization.

155928420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50989 (or 50984 counting only the distinct ones).

The product of its (nonzero) digits is 28800, while the sum is 36.

The square root of 155928420 is about 12487.1301747039. The cubic root of 155928420 is about 538.2389130657.

The spelling of 155928420 in words is "one hundred fifty-five million, nine hundred twenty-eight thousand, four hundred twenty".