18980240 has 40 divisors (see below), whose sum is σ = 46455360. Its totient is φ = 7191936.

The previous prime is 18980237. The next prime is 18980251. The reversal of 18980240 is 4208981.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is a junction number, because it is equal to n+sod(n) for n = 18980197 and 18980206.

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, 4724 + ... + 7763.

It is an arithmetic number, because the mean of its divisors is an integer number (1161384).

Almost surely, 2^18980240 is an apocalyptic number.

18980240 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

18980240 is an abundant number, since it is smaller than the sum of its proper divisors (27475120).

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

18980240 is a wasteful number, since it uses less digits than its factorization.

18980240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12519 (or 12513 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 32.

The square root of 18980240 is about 4356.6317264602. The cubic root of 18980240 is about 266.7476281949.

The spelling of 18980240 in words is "eighteen million, nine hundred eighty thousand, two hundred forty".