18290984 has 8 divisors (see below), whose sum is σ = 34295610. Its totient is φ = 9145488.

The previous prime is 18290983. The next prime is 18291001. The reversal of 18290984 is 48909281.

It can be written as a sum of positive squares in only one way, i.e., 18062500 + 228484 = 4250^2 + 478^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (18290983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1143179 + ... + 1143194.

Almost surely, 2^18290984 is an apocalyptic number.

It is an amenable number.

18290984 is a deficient number, since it is larger than the sum of its proper divisors (16004626).

18290984 is a wasteful number, since it uses less digits than its factorization.

18290984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2286379 (or 2286375 counting only the distinct ones).

The product of its (nonzero) digits is 41472, while the sum is 41.

The square root of 18290984 is about 4276.7959970052. The cubic root of 18290984 is about 263.4788079747.

The spelling of 18290984 in words is "eighteen million, two hundred ninety thousand, nine hundred eighty-four".