188013400 has 24 divisors (see below), whose sum is σ = 437131620. Its totient is φ = 75205280.

The previous prime is 188013389. The next prime is 188013401. The reversal of 188013400 is 4310881.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188013401) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 469834 + ... + 470233.

Almost surely, 2^188013400 is an apocalyptic number.

188013400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188013400 is an abundant number, since it is smaller than the sum of its proper divisors (249118220).

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

188013400 is a wasteful number, since it uses less digits than its factorization.

188013400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 940083 (or 940074 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 25.

The square root of 188013400 is about 13711.7978398166. The cubic root of 188013400 is about 572.8790419075.

It can be divided in two parts, 18801 and 3400, that added together give a square (22201 = 149²).

The spelling of 188013400 in words is "one hundred eighty-eight million, thirteen thousand, four hundred".