18498840 has 32 divisors (see below), whose sum is σ = 55496880. Its totient is φ = 4932992.

The previous prime is 18498833. The next prime is 18498863. The reversal of 18498840 is 4889481.

It is a junction number, because it is equal to n+sod(n) for n = 18498792 and 18498801.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 76959 + ... + 77198.

Almost surely, 2^18498840 is an apocalyptic number.

18498840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18498840 is an abundant number, since it is smaller than the sum of its proper divisors (36998040).

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

18498840 is a wasteful number, since it uses less digits than its factorization.

18498840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154171 (or 154167 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 42.

The square root of 18498840 is about 4301.0277841465. The cubic root of 18498840 is about 264.4730956777.

The spelling of 18498840 in words is "eighteen million, four hundred ninety-eight thousand, eight hundred forty".