18860490 has 48 divisors (see below), whose sum is σ = 53498016. Its totient is φ = 4572000.

The previous prime is 18860477. The next prime is 18860503. The reversal of 18860490 is 9406881.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (18860477) and next prime (18860503).

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8536 + ... + 10515.

It is an arithmetic number, because the mean of its divisors is an integer number (1114542).

Almost surely, 2^18860490 is an apocalyptic number.

18860490 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

18860490 is an abundant number, since it is smaller than the sum of its proper divisors (34637526).

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

18860490 is a wasteful number, since it uses less digits than its factorization.

18860490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19075 (or 19072 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 18860490 is about 4342.8665648394. The cubic root of 18860490 is about 266.1854568141.

The spelling of 18860490 in words is "eighteen million, eight hundred sixty thousand, four hundred ninety".