180472840 has 32 divisors (see below), whose sum is σ = 409040280. Its totient is φ = 71660032.

The previous prime is 180472819. The next prime is 180472843. The reversal of 180472840 is 48274081.

It can be written as a sum of positive squares in 4 ways, for example, as 105719524 + 74753316 = 10282^2 + 8646^2 .

It is a junction number, because it is equal to n+sod(n) for n = 180472796 and 180472805.

It is not an unprimeable number, because it can be changed into a prime (180472843) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10987 + ... + 21946.

Almost surely, 2^180472840 is an apocalyptic number.

180472840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180472840 is an abundant number, since it is smaller than the sum of its proper divisors (228567440).

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

180472840 is a wasteful number, since it uses less digits than its factorization.

180472840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33081 (or 33077 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 180472840 is about 13434.0180139823. The cubic root of 180472840 is about 565.1155844662.

The spelling of 180472840 in words is "one hundred eighty million, four hundred seventy-two thousand, eight hundred forty".