189253440 has 84 divisors (see below), whose sum is σ = 650962884. Its totient is φ = 50466816.

The previous prime is 189253439. The next prime is 189253447. The reversal of 189253440 is 44352981.

189253440 is a `hidden beast` number, since 1 + 89 + 2 + 534 + 40 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 120297024 + 68956416 = 10968^2 + 8304^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 189253395 and 189253404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189253447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 29977 + ... + 35736.

Almost surely, 2^189253440 is an apocalyptic number.

189253440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189253440 is an abundant number, since it is smaller than the sum of its proper divisors (461709444).

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

189253440 is a wasteful number, since it uses less digits than its factorization.

189253440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65736 (or 65723 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 36.

The square root of 189253440 is about 13756.9415205561. The cubic root of 189253440 is about 574.1357552214.

The spelling of 189253440 in words is "one hundred eighty-nine million, two hundred fifty-three thousand, four hundred forty".