180730644 has 48 divisors (see below), whose sum is σ = 435210048. Its totient is φ = 58330368.

The previous prime is 180730643. The next prime is 180730687. The reversal of 180730644 is 446037081.

180730644 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180730643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102579 + ... + 104325.

It is an arithmetic number, because the mean of its divisors is an integer number (9066876).

Almost surely, 2^180730644 is an apocalyptic number.

It is an amenable number.

180730644 is an abundant number, since it is smaller than the sum of its proper divisors (254479404).

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

180730644 is a wasteful number, since it uses less digits than its factorization.

180730644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2024 (or 2022 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 33.

The square root of 180730644 is about 13443.6097830903. The cubic root of 180730644 is about 565.3845441265.

The spelling of 180730644 in words is "one hundred eighty million, seven hundred thirty thousand, six hundred forty-four".