18049272 has 16 divisors (see below), whose sum is σ = 45123240. Its totient is φ = 6016416.

The previous prime is 18049271. The next prime is 18049279. The reversal of 18049272 is 27294081.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (18049271) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376003 + ... + 376050.

Almost surely, 2^18049272 is an apocalyptic number.

18049272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18049272 is an abundant number, since it is smaller than the sum of its proper divisors (27073968).

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

18049272 is a wasteful number, since it uses less digits than its factorization.

18049272 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752062 (or 752058 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 33.

The square root of 18049272 is about 4248.4434796758. The cubic root of 18049272 is about 262.3130496535.

The spelling of 18049272 in words is "eighteen million, forty-nine thousand, two hundred seventy-two".