189451040 has 24 divisors (see below), whose sum is σ = 447578460. Its totient is φ = 75780352.

The previous prime is 189451039. The next prime is 189451057. The reversal of 189451040 is 40154981.

It can be written as a sum of positive squares in 2 ways, for example, as 175403536 + 14047504 = 13244^2 + 3748^2 .

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a junction number, because it is equal to n+sod(n) for n = 189450988 and 189451006.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 591875 + ... + 592194.

Almost surely, 2^189451040 is an apocalyptic number.

189451040 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189451040 is an abundant number, since it is smaller than the sum of its proper divisors (258127420).

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

189451040 is a wasteful number, since it uses less digits than its factorization.

189451040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1184084 (or 1184076 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 189451040 is about 13764.1214757790. The cubic root of 189451040 is about 574.3355045873.

The spelling of 189451040 in words is "one hundred eighty-nine million, four hundred fifty-one thousand, forty".