188904425 has 48 divisors (see below), whose sum is σ = 261826992. Its totient is φ = 134553600.

The previous prime is 188904413. The next prime is 188904439. The reversal of 188904425 is 524409881.

It can be written as a sum of positive squares in 24 ways, for example, as 53042089 + 135862336 = 7283^2 + 11656^2 .

It is not a de Polignac number, because 188904425 - 2⁶ = 188904361 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 644579 + ... + 644871.

It is an arithmetic number, because the mean of its divisors is an integer number (5454729).

Almost surely, 2^188904425 is an apocalyptic number.

It is an amenable number.

188904425 is a deficient number, since it is larger than the sum of its proper divisors (72922567).

188904425 is a wasteful number, since it uses less digits than its factorization.

188904425 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 398 (or 393 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 41.

The square root of 188904425 is about 13744.2506161667. The cubic root of 188904425 is about 573.7826039193.

The spelling of 188904425 in words is "one hundred eighty-eight million, nine hundred four thousand, four hundred twenty-five".