1299047660 has 12 divisors (see below), whose sum is σ = 2728000128. Its totient is φ = 519619056.

The previous prime is 1299047647. The next prime is 1299047669. The reversal of 1299047660 is 667409921.

It is not an unprimeable number, because it can be changed into a prime (1299047669) 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, 32476172 + ... + 32476211.

It is an arithmetic number, because the mean of its divisors is an integer number (227333344).

Almost surely, 2^1299047660 is an apocalyptic number.

1299047660 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1299047660 is an abundant number, since it is smaller than the sum of its proper divisors (1428952468).

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

1299047660 is a wasteful number, since it uses less digits than its factorization.

1299047660 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64952392 (or 64952390 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 44.

The square root of 1299047660 is about 36042.3037554483. The cubic root of 1299047660 is about 1091.1263110081.

The spelling of 1299047660 in words is "one billion, two hundred ninety-nine million, forty-seven thousand, six hundred sixty".