1223499660 has 24 divisors (see below), whose sum is σ = 3425799216. Its totient is φ = 326266560.

The previous prime is 1223499653. The next prime is 1223499701. The reversal of 1223499660 is 669943221.

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, 10195771 + ... + 10195890.

It is an arithmetic number, because the mean of its divisors is an integer number (142741634).

Almost surely, 2^1223499660 is an apocalyptic number.

1223499660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223499660 is an abundant number, since it is smaller than the sum of its proper divisors (2202299556).

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

1223499660 is a wasteful number, since it uses less digits than its factorization.

1223499660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20391673 (or 20391671 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 1223499660 is about 34978.5600046657. The cubic root of 1223499660 is about 1069.5504735299.

The spelling of 1223499660 in words is "one billion, two hundred twenty-three million, four hundred ninety-nine thousand, six hundred sixty".