1299640270 has 32 divisors (see below), whose sum is σ = 2363356800. Its totient is φ = 514545696.

The previous prime is 1299640247. The next prime is 1299640289. The reversal of 1299640270 is 720469921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 525577 + ... + 528043.

It is an arithmetic number, because the mean of its divisors is an integer number (73854900).

Almost surely, 2^1299640270 is an apocalyptic number.

1299640270 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1299640270 is a deficient number, since it is larger than the sum of its proper divisors (1063716530).

1299640270 is a wasteful number, since it uses less digits than its factorization.

1299640270 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2992.

The product of its (nonzero) digits is 54432, while the sum is 40.

The square root of 1299640270 is about 36050.5238519498. The cubic root of 1299640270 is about 1091.2922053737.

The spelling of 1299640270 in words is "one billion, two hundred ninety-nine million, six hundred forty thousand, two hundred seventy".