189937404 has 36 divisors (see below), whose sum is σ = 500996496. Its totient is φ = 60559488.

The previous prime is 189937393. The next prime is 189937411. The reversal of 189937404 is 404739981.

It is a tau number, because it is divible by the number of its divisors (36).

It is a self number, because there is not a number n which added to its sum of digits gives 189937404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113869 + ... + 115524.

Almost surely, 2^189937404 is an apocalyptic number.

It is an amenable number.

189937404 is an abundant number, since it is smaller than the sum of its proper divisors (311059092).

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

189937404 is a wasteful number, since it uses less digits than its factorization.

189937404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 229426 (or 229421 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 189937404 is about 13781.7779694784. Note that the first 3 decimals coincide. The cubic root of 189937404 is about 574.8265679844.

The spelling of 189937404 in words is "one hundred eighty-nine million, nine hundred thirty-seven thousand, four hundred four".