18880628 has 24 divisors (see below), whose sum is σ = 35736288. Its totient is φ = 8676576.

The previous prime is 18880613. The next prime is 18880633. The reversal of 18880628 is 82608881.

It is a super-2 number, since 2×18880628² = 712956227348768, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14075 + ... + 15357.

It is an arithmetic number, because the mean of its divisors is an integer number (1489012).

Almost surely, 2^18880628 is an apocalyptic number.

It is an amenable number.

18880628 is a deficient number, since it is larger than the sum of its proper divisors (16855660).

18880628 is a wasteful number, since it uses less digits than its factorization.

18880628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1583 (or 1581 counting only the distinct ones).

The product of its (nonzero) digits is 49152, while the sum is 41.

The square root of 18880628 is about 4345.1844609867. The cubic root of 18880628 is about 266.2801616003.

The spelling of 18880628 in words is "eighteen million, eight hundred eighty thousand, six hundred twenty-eight".