180934640 has 40 divisors (see below), whose sum is σ = 430941168. Its totient is φ = 70607360.

The previous prime is 180934619. The next prime is 180934643. The reversal of 180934640 is 46439081.

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

It is a self number, because there is not a number n which added to its sum of digits gives 180934640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180934643) 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, 24302 + ... + 30861.

Almost surely, 2^180934640 is an apocalyptic number.

180934640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180934640 is an abundant number, since it is smaller than the sum of its proper divisors (250006528).

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

180934640 is a wasteful number, since it uses less digits than its factorization.

180934640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55217 (or 55211 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 180934640 is about 13451.1947424755. The cubic root of 180934640 is about 565.5971862029.

The spelling of 180934640 in words is "one hundred eighty million, nine hundred thirty-four thousand, six hundred forty".