180372738 has 64 divisors (see below), whose sum is σ = 467389440. Its totient is φ = 45064512.

The previous prime is 180372733. The next prime is 180372767. The reversal of 180372738 is 837273081.

It is a super-2 number, since 2×180372738² = 65068649227233288, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 180372696 and 180372705.

It is not an unprimeable number, because it can be changed into a prime (180372733) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1681 + ... + 19067.

It is an arithmetic number, because the mean of its divisors is an integer number (7302960).

Almost surely, 2^180372738 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 180372738, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (233694720).

180372738 is an abundant number, since it is smaller than the sum of its proper divisors (287016702).

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

180372738 is a wasteful number, since it uses less digits than its factorization.

180372738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17431.

The product of its (nonzero) digits is 56448, while the sum is 39.

The square root of 180372738 is about 13430.2918062118. The cubic root of 180372738 is about 565.0110818303.

The spelling of 180372738 in words is "one hundred eighty million, three hundred seventy-two thousand, seven hundred thirty-eight".