18748628 has 12 divisors (see below), whose sum is σ = 32856852. Its totient is φ = 9360960.

The previous prime is 18748627. The next prime is 18748643. The reversal of 18748628 is 82684781.

It can be written as a sum of positive squares in 2 ways, for example, as 12588304 + 6160324 = 3548^2 + 2482^2 .

It is a super-2 number, since 2×18748628² = 703022103764768, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18748627) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 248 + ... + 6128.

It is an arithmetic number, because the mean of its divisors is an integer number (2738071).

Almost surely, 2^18748628 is an apocalyptic number.

It is an amenable number.

18748628 is a deficient number, since it is larger than the sum of its proper divisors (14108224).

18748628 is a wasteful number, since it uses less digits than its factorization.

18748628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6682 (or 6680 counting only the distinct ones).

The product of its digits is 172032, while the sum is 44.

The square root of 18748628 is about 4329.9685911101. The cubic root of 18748628 is about 265.6581622818.

The spelling of 18748628 in words is "eighteen million, seven hundred forty-eight thousand, six hundred twenty-eight".