180394320 has 40 divisors (see below), whose sum is σ = 559223136. Its totient is φ = 48105088.

The previous prime is 180394273. The next prime is 180394321. The reversal of 180394320 is 23493081.

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

It is a super-2 number, since 2×180394320² = 65084221376524800, which contains 22 as substring.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180394321) 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, 375582 + ... + 376061.

Almost surely, 2^180394320 is an apocalyptic number.

180394320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

180394320 is an abundant number, since it is smaller than the sum of its proper divisors (378828816).

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

180394320 is a wasteful number, since it uses less digits than its factorization.

180394320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 751659 (or 751653 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 180394320 is about 13431.0952643483. The cubic root of 180394320 is about 565.0336158765.

The spelling of 180394320 in words is "one hundred eighty million, three hundred ninety-four thousand, three hundred twenty".