189883640 has 16 divisors (see below), whose sum is σ = 427238280. Its totient is φ = 75953440.

The previous prime is 189883637. The next prime is 189883643. The reversal of 189883640 is 46388981.

189883640 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (189883637) and next prime (189883643).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189883643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2373506 + ... + 2373585.

Almost surely, 2^189883640 is an apocalyptic number.

189883640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189883640 is an abundant number, since it is smaller than the sum of its proper divisors (237354640).

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

189883640 is a wasteful number, since it uses less digits than its factorization.

189883640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4747102 (or 4747098 counting only the distinct ones).

The product of its (nonzero) digits is 331776, while the sum is 47.

The square root of 189883640 is about 13779.8272848392. The cubic root of 189883640 is about 574.7723257421.

The spelling of 189883640 in words is "one hundred eighty-nine million, eight hundred eighty-three thousand, six hundred forty".