189448690 has 16 divisors (see below), whose sum is σ = 342217728. Its totient is φ = 75510576.

The previous prime is 189448643. The next prime is 189448709. The reversal of 189448690 is 96844981.

189448690 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×189448690² = 71781612285432200, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30642 + ... + 36301.

It is an arithmetic number, because the mean of its divisors is an integer number (21388608).

Almost surely, 2^189448690 is an apocalyptic number.

189448690 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189448690 is a deficient number, since it is larger than the sum of its proper divisors (152769038).

189448690 is a wasteful number, since it uses less digits than its factorization.

189448690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67233.

The product of its (nonzero) digits is 497664, while the sum is 49.

The square root of 189448690 is about 13764.0361086420. The cubic root of 189448690 is about 574.3331298418. Note that the first 3 decimals are identical.

The spelling of 189448690 in words is "one hundred eighty-nine million, four hundred forty-eight thousand, six hundred ninety".