180690428 has 12 divisors (see below), whose sum is σ = 319278960. Its totient is φ = 89467872.

The previous prime is 180690427. The next prime is 180690431. The reversal of 180690428 is 824096081.

It is a junction number, because it is equal to n+sod(n) for n = 180690391 and 180690400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180690427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 218873 + ... + 219696.

It is an arithmetic number, because the mean of its divisors is an integer number (26606580).

Almost surely, 2^180690428 is an apocalyptic number.

It is an amenable number.

180690428 is a deficient number, since it is larger than the sum of its proper divisors (138588532).

180690428 is a wasteful number, since it uses less digits than its factorization.

180690428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 438676 (or 438674 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 180690428 is about 13442.1139706521. The cubic root of 180690428 is about 565.3426047501.

The spelling of 180690428 in words is "one hundred eighty million, six hundred ninety thousand, four hundred twenty-eight".