18480788 has 12 divisors (see below), whose sum is σ = 32372340. Its totient is φ = 9231552.

The previous prime is 18480779. The next prime is 18480809. The reversal of 18480788 is 88708481.

It can be written as a sum of positive squares in 2 ways, for example, as 13454224 + 5026564 = 3668^2 + 2242^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5408 + ... + 8136.

It is an arithmetic number, because the mean of its divisors is an integer number (2697695).

Almost surely, 2^18480788 is an apocalyptic number.

It is an amenable number.

18480788 is a deficient number, since it is larger than the sum of its proper divisors (13891552).

18480788 is a wasteful number, since it uses less digits than its factorization.

18480788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4426 (or 4424 counting only the distinct ones).

The product of its (nonzero) digits is 114688, while the sum is 44.

The square root of 18480788 is about 4298.9287037586. The cubic root of 18480788 is about 264.3870394322.

The spelling of 18480788 in words is "eighteen million, four hundred eighty thousand, seven hundred eighty-eight".