189078240 has 192 divisors, whose sum is σ = 648841536. Its totient is φ = 46006272.

The previous prime is 189078229. The next prime is 189078271. The reversal of 189078240 is 42870981.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 979584 + ... + 979776.

It is an arithmetic number, because the mean of its divisors is an integer number (3379383).

Almost surely, 2^189078240 is an apocalyptic number.

189078240 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 189078240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (324420768).

189078240 is an abundant number, since it is smaller than the sum of its proper divisors (459763296).

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

189078240 is a wasteful number, since it uses less digits than its factorization.

189078240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381 (or 373 counting only the distinct ones).

The product of its (nonzero) digits is 32256, while the sum is 39.

The square root of 189078240 is about 13750.5723517241. The cubic root of 189078240 is about 573.9585331851.

The spelling of 189078240 in words is "one hundred eighty-nine million, seventy-eight thousand, two hundred forty".