188028400 has 60 divisors (see below), whose sum is σ = 516279952. Its totient is φ = 64465920.

The previous prime is 188028391. The next prime is 188028409. The reversal of 188028400 is 4820881.

188028400 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (188028391) and next prime (188028409).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188028409) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 30777 + ... + 36376.

Almost surely, 2^188028400 is an apocalyptic number.

188028400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

188028400 is an abundant number, since it is smaller than the sum of its proper divisors (328251552).

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

188028400 is a wasteful number, since it uses less digits than its factorization.

188028400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67178 (or 67167 counting only the distinct ones).

The product of its (nonzero) digits is 4096, while the sum is 31.

The square root of 188028400 is about 13712.3448031327. The cubic root of 188028400 is about 572.8942765612.

The spelling of 188028400 in words is "one hundred eighty-eight million, twenty-eight thousand, four hundred".