18906028 has 24 divisors (see below), whose sum is σ = 34398000. Its totient is φ = 9081408.

The previous prime is 18905963. The next prime is 18906031. The reversal of 18906028 is 82060981.

18906028 = 162² + 163² + ... + 393².

It is a junction number, because it is equal to n+sod(n) for n = 18905984 and 18906002.

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, 40251 + ... + 40717.

It is an arithmetic number, because the mean of its divisors is an integer number (1433250).

Almost surely, 2^18906028 is an apocalyptic number.

It is an amenable number.

18906028 is a deficient number, since it is larger than the sum of its proper divisors (15491972).

18906028 is a wasteful number, since it uses less digits than its factorization.

18906028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 849 (or 847 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 18906028 is about 4348.1062544515. The cubic root of 18906028 is about 266.3995164826.

The spelling of 18906028 in words is "eighteen million, nine hundred six thousand, twenty-eight".