189267440 has 40 divisors (see below), whose sum is σ = 442538640. Its totient is φ = 75278336.

The previous prime is 189267413. The next prime is 189267461. The reversal of 189267440 is 44762981.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 7712 + ... + 20928.

It is an arithmetic number, because the mean of its divisors is an integer number (11063466).

Almost surely, 2^189267440 is an apocalyptic number.

189267440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 189267440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (221269320).

189267440 is an abundant number, since it is smaller than the sum of its proper divisors (253271200).

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

189267440 is a wasteful number, since it uses less digits than its factorization.

189267440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13409 (or 13403 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 41.

The square root of 189267440 is about 13757.4503451766. The cubic root of 189267440 is about 574.1499120796.

The spelling of 189267440 in words is "one hundred eighty-nine million, two hundred sixty-seven thousand, four hundred forty".