18790785 has 80 divisors (see below), whose sum is σ = 37566144. Its totient is φ = 8926848.

The previous prime is 18790777. The next prime is 18790787. The reversal of 18790785 is 58709781.

It is not a de Polignac number, because 18790785 - 2³ = 18790777 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 18790785.

It is not an unprimeable number, because it can be changed into a prime (18790787) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 226354 + ... + 226436.

Almost surely, 2^18790785 is an apocalyptic number.

18790785 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

18790785 is a deficient number, since it is larger than the sum of its proper divisors (18775359).

18790785 is a wasteful number, since it uses less digits than its factorization.

18790785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 156 (or 147 counting only the distinct ones).

The product of its (nonzero) digits is 141120, while the sum is 45.

The square root of 18790785 is about 4334.8339068527. The cubic root of 18790785 is about 265.8571273752.

The spelling of 18790785 in words is "eighteen million, seven hundred ninety thousand, seven hundred eighty-five".