180628990 has 16 divisors (see below), whose sum is σ = 332050752. Its totient is φ = 70714144.

The previous prime is 180628969. The next prime is 180628993. The reversal of 180628990 is 99826081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (180628993) 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, 191689 + ... + 192628.

It is an arithmetic number, because the mean of its divisors is an integer number (20753172).

Almost surely, 2^180628990 is an apocalyptic number.

180628990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

180628990 is a deficient number, since it is larger than the sum of its proper divisors (151421762).

180628990 is a wasteful number, since it uses less digits than its factorization.

180628990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384371.

The product of its (nonzero) digits is 62208, while the sum is 43.

The square root of 180628990 is about 13439.8284959296. The cubic root of 180628990 is about 565.2785219304.

The spelling of 180628990 in words is "one hundred eighty million, six hundred twenty-eight thousand, nine hundred ninety".