18893790 has 128 divisors (see below), whose sum is σ = 55296000. Its totient is φ = 4572288.

The previous prime is 18893789. The next prime is 18893801. The reversal of 18893790 is 9739881.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 148707 + ... + 148833.

It is an arithmetic number, because the mean of its divisors is an integer number (432000).

Almost surely, 2^18893790 is an apocalyptic number.

18893790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 18893790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27648000).

18893790 is an abundant number, since it is smaller than the sum of its proper divisors (36402210).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

18893790 is a wasteful number, since it uses less digits than its factorization.

18893790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 191 (or 185 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 18893790 is about 4346.6987473254. The cubic root of 18893790 is about 266.3420233383.

It can be divided in two parts, 18893 and 790, that added together give a 9-th power (19683 = 3⁹).

The spelling of 18893790 in words is "eighteen million, eight hundred ninety-three thousand, seven hundred ninety".