188530812 has 18 divisors (see below), whose sum is σ = 476564088. Its totient is φ = 62843592.

The previous prime is 188530807. The next prime is 188530819. The reversal of 188530812 is 218035881.

188530812 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 5236967 = 188530812 / (1 + 8 + 8 + 5 + 3 + 0 + 8 + 1 + 2).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (188530819) 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, 2618448 + ... + 2618519.

Almost surely, 2^188530812 is an apocalyptic number.

188530812 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

188530812 is an abundant number, since it is smaller than the sum of its proper divisors (288033276).

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

188530812 is a wasteful number, since it uses less digits than its factorization.

188530812 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5236977 (or 5236972 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 36.

The square root of 188530812 is about 13730.6522787521. The cubic root of 188530812 is about 573.4040807174.

The spelling of 188530812 in words is "one hundred eighty-eight million, five hundred thirty thousand, eight hundred twelve".