189649140 has 48 divisors (see below), whose sum is σ = 531740160. Its totient is φ = 50504320.

The previous prime is 189649073. The next prime is 189649151. The reversal of 189649140 is 41946981.

It is a junction number, because it is equal to n+sod(n) for n = 189649092 and 189649101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 54781 + ... + 58139.

It is an arithmetic number, because the mean of its divisors is an integer number (11077920).

Almost surely, 2^189649140 is an apocalyptic number.

189649140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189649140 is an abundant number, since it is smaller than the sum of its proper divisors (342091020).

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

189649140 is a wasteful number, since it uses less digits than its factorization.

189649140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4312 (or 4310 counting only the distinct ones).

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 189649140 is about 13771.3158412695. The cubic root of 189649140 is about 574.5356200187.

The spelling of 189649140 in words is "one hundred eighty-nine million, six hundred forty-nine thousand, one hundred forty".