155188400 has 30 divisors (see below), whose sum is σ = 372841092. Its totient is φ = 62075200.

The previous prime is 155188391. The next prime is 155188487. The reversal of 155188400 is 4881551.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 193586 + ... + 194385.

Almost surely, 2^155188400 is an apocalyptic number.

155188400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155188400 is an abundant number, since it is smaller than the sum of its proper divisors (217652692).

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

155188400 is a wasteful number, since it uses less digits than its factorization.

155188400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 387989 (or 387978 counting only the distinct ones).

The product of its (nonzero) digits is 6400, while the sum is 32.

The square root of 155188400 is about 12457.4636262764. The cubic root of 155188400 is about 537.3860872717.

The spelling of 155188400 in words is "one hundred fifty-five million, one hundred eighty-eight thousand, four hundred".