180461640 has 32 divisors (see below), whose sum is σ = 541385280. Its totient is φ = 48123072.

The previous prime is 180461597. The next prime is 180461641. The reversal of 180461640 is 46164081.

It is a super-2 number, since 2×180461640² = 65132807022979200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 180461598 and 180461607.

It is not an unprimeable number, because it can be changed into a prime (180461641) 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, 751804 + ... + 752043.

It is an arithmetic number, because the mean of its divisors is an integer number (16918290).

Almost surely, 2^180461640 is an apocalyptic number.

180461640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180461640 is an abundant number, since it is smaller than the sum of its proper divisors (360923640).

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

180461640 is a wasteful number, since it uses less digits than its factorization.

180461640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1503861 (or 1503857 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 30.

The square root of 180461640 is about 13433.6011553120. The cubic root of 180461640 is about 565.1038940174.

The spelling of 180461640 in words is "one hundred eighty million, four hundred sixty-one thousand, six hundred forty".