189774942 has 24 divisors (see below), whose sum is σ = 441517896. Its totient is φ = 54221328.

The previous prime is 189774941. The next prime is 189774943. The reversal of 189774942 is 249477981.

It is an interprime number because it is at equal distance from previous prime (189774941) and next prime (189774943).

It is a super-2 number, since 2×189774942² = 72029057222206728, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189774941) 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, 322453 + ... + 323040.

It is an arithmetic number, because the mean of its divisors is an integer number (18396579).

Almost surely, 2^189774942 is an apocalyptic number.

189774942 is an abundant number, since it is smaller than the sum of its proper divisors (251742954).

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

189774942 is a wasteful number, since it uses less digits than its factorization.

189774942 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 645512 (or 645505 counting only the distinct ones).

The product of its digits is 1016064, while the sum is 51.

The square root of 189774942 is about 13775.8826214512. The cubic root of 189774942 is about 574.6626295662.

The spelling of 189774942 in words is "one hundred eighty-nine million, seven hundred seventy-four thousand, nine hundred forty-two".