155813400 has 144 divisors (see below), whose sum is σ = 528816600. Its totient is φ = 41111040.

The previous prime is 155813393. The next prime is 155813417. The reversal of 155813400 is 4318551.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 192196 + ... + 193004.

Almost surely, 2^155813400 is an apocalyptic number.

155813400 is a gapful number since it is divisible by the number (10) 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 155813400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (264408300).

155813400 is an abundant number, since it is smaller than the sum of its proper divisors (373003200).

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

155813400 is a wasteful number, since it uses less digits than its factorization.

155813400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 938 (or 926 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 27.

The square root of 155813400 is about 12482.5237832740. The cubic root of 155813400 is about 538.1065372226.

It can be divided in two parts, 15581 and 3400, that added together give a palindrome (18981).

The spelling of 155813400 in words is "one hundred fifty-five million, eight hundred thirteen thousand, four hundred".