189879320 has 16 divisors (see below), whose sum is σ = 427228560. Its totient is φ = 75951712.

The previous prime is 189879281. The next prime is 189879359. The reversal of 189879320 is 23978981.

It is an interprime number because it is at equal distance from previous prime (189879281) and next prime (189879359).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2373452 + ... + 2373531.

It is an arithmetic number, because the mean of its divisors is an integer number (26701785).

Almost surely, 2^189879320 is an apocalyptic number.

189879320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189879320 is an abundant number, since it is smaller than the sum of its proper divisors (237349240).

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

189879320 is a wasteful number, since it uses less digits than its factorization.

189879320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4746994 (or 4746990 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 189879320 is about 13779.6705330715. The cubic root of 189879320 is about 574.7679668704.

It can be divided in two parts, 1898 and 79320, that added together give a palindrome (81218).

The spelling of 189879320 in words is "one hundred eighty-nine million, eight hundred seventy-nine thousand, three hundred twenty".