189929454 has 64 divisors (see below), whose sum is σ = 449100288. Its totient is φ = 52790400.

The previous prime is 189929401. The next prime is 189929479. The reversal of 189929454 is 454929981.

It is a junction number, because it is equal to n+sod(n) for n = 189929397 and 189929406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 154687 + ... + 155909.

It is an arithmetic number, because the mean of its divisors is an integer number (7017192).

Almost surely, 2^189929454 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189929454, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (224550144).

189929454 is an abundant number, since it is smaller than the sum of its proper divisors (259170834).

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

189929454 is a wasteful number, since it uses less digits than its factorization.

189929454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1433.

The product of its digits is 933120, while the sum is 51.

The square root of 189929454 is about 13781.4895421359. The cubic root of 189929454 is about 574.8185479124.

The spelling of 189929454 in words is "one hundred eighty-nine million, nine hundred twenty-nine thousand, four hundred fifty-four".