18417072 has 40 divisors (see below), whose sum is σ = 48689344. Its totient is φ = 5995584.

The previous prime is 18417067. The next prime is 18417127. The reversal of 18417072 is 27071481.

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, 2398 + ... + 6525.

Almost surely, 2^18417072 is an apocalyptic number.

18417072 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18417072 is an abundant number, since it is smaller than the sum of its proper divisors (30272272).

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

18417072 is a wasteful number, since it uses less digits than its factorization.

18417072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8977 (or 8971 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 18417072 is about 4291.5116217948. The cubic root of 18417072 is about 264.0828481945.

The spelling of 18417072 in words is "eighteen million, four hundred seventeen thousand, seventy-two".