189428974 has 48 divisors (see below), whose sum is σ = 352336608. Its totient is φ = 74758464.

The previous prime is 189428971. The next prime is 189429001. The reversal of 189428974 is 479824981.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189428971) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 186492 + ... + 187504.

It is an arithmetic number, because the mean of its divisors is an integer number (7340346).

Almost surely, 2^189428974 is an apocalyptic number.

189428974 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

189428974 is a deficient number, since it is larger than the sum of its proper divisors (162907634).

189428974 is a wasteful number, since it uses less digits than its factorization.

189428974 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1097 (or 1078 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 52.

The square root of 189428974 is about 13763.3198756695. The cubic root of 189428974 is about 574.3132054587.

The spelling of 189428974 in words is "one hundred eighty-nine million, four hundred twenty-eight thousand, nine hundred seventy-four".