180431428 has 6 divisors (see below), whose sum is σ = 315755006. Its totient is φ = 90215712.

The previous prime is 180431423. The next prime is 180431431. The reversal of 180431428 is 824134081.

It can be written as a sum of positive squares in only one way, i.e., 179345664 + 1085764 = 13392^2 + 1042^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 180431428.

It is not an unprimeable number, because it can be changed into a prime (180431423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22553925 + ... + 22553932.

Almost surely, 2^180431428 is an apocalyptic number.

It is an amenable number.

180431428 is a deficient number, since it is larger than the sum of its proper divisors (135323578).

180431428 is a wasteful number, since it uses less digits than its factorization.

180431428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45107861 (or 45107859 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 31.

The square root of 180431428 is about 13432.4766145339. The cubic root of 180431428 is about 565.0723566194.

The spelling of 180431428 in words is "one hundred eighty million, four hundred thirty-one thousand, four hundred twenty-eight".