189936464 has 20 divisors (see below), whose sum is σ = 387371040. Its totient is φ = 89969760.

The previous prime is 189936463. The next prime is 189936479. The reversal of 189936464 is 464639981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189936463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 312092 + ... + 312699.

It is an arithmetic number, because the mean of its divisors is an integer number (19368552).

Almost surely, 2^189936464 is an apocalyptic number.

It is an amenable number.

189936464 is an abundant number, since it is smaller than the sum of its proper divisors (197434576).

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

189936464 is a wasteful number, since it uses less digits than its factorization.

189936464 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 624818 (or 624812 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 50.

The square root of 189936464 is about 13781.7438664343. The cubic root of 189936464 is about 574.8256197108.

The spelling of 189936464 in words is "one hundred eighty-nine million, nine hundred thirty-six thousand, four hundred sixty-four".