18483990 has 32 divisors (see below), whose sum is σ = 50699520. Its totient is φ = 4224864.

The previous prime is 18483943. The next prime is 18484003. The reversal of 18483990 is 9938481.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 43800 + ... + 44219.

It is an arithmetic number, because the mean of its divisors is an integer number (1584360).

Almost surely, 2^18483990 is an apocalyptic number.

18483990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18483990 is an abundant number, since it is smaller than the sum of its proper divisors (32215530).

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

18483990 is a wasteful number, since it uses less digits than its factorization.

18483990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 88036.

The product of its (nonzero) digits is 62208, while the sum is 42.

The square root of 18483990 is about 4299.3011059939. The cubic root of 18483990 is about 264.4023078723.

The spelling of 18483990 in words is "eighteen million, four hundred eighty-three thousand, nine hundred ninety".