18485772 has 12 divisors (see below), whose sum is σ = 43133496. Its totient is φ = 6161920.

The previous prime is 18485771. The next prime is 18485791. The reversal of 18485772 is 27758481.

It is a tau number, because it is divible by the number of its divisors (12).

It is not an unprimeable number, because it can be changed into a prime (18485771) 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, 770229 + ... + 770252.

It is an arithmetic number, because the mean of its divisors is an integer number (3594458).

Almost surely, 2^18485772 is an apocalyptic number.

18485772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

18485772 is an abundant number, since it is smaller than the sum of its proper divisors (24647724).

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

18485772 is a wasteful number, since it uses less digits than its factorization.

18485772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540488 (or 1540486 counting only the distinct ones).

The product of its digits is 125440, while the sum is 42.

The square root of 18485772 is about 4299.5083439854. The cubic root of 18485772 is about 264.4108044103.

The spelling of 18485772 in words is "eighteen million, four hundred eighty-five thousand, seven hundred seventy-two".