1299910320 has 120 divisors (see below), whose sum is σ = 4555395936. Its totient is φ = 331567104.

The previous prime is 1299910301. The next prime is 1299910331. The reversal of 1299910320 is 230199921.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (120).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22689 + ... + 55808.

Almost surely, 2^1299910320 is an apocalyptic number.

1299910320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1299910320 is an abundant number, since it is smaller than the sum of its proper divisors (3255485616).

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

1299910320 is a wasteful number, since it uses less digits than its factorization.

1299910320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78539 (or 78530 counting only the distinct ones).

The product of its (nonzero) digits is 8748, while the sum is 36.

The square root of 1299910320 is about 36054.2690953512. The cubic root of 1299910320 is about 1091.3677860446.

The spelling of 1299910320 in words is "one billion, two hundred ninety-nine million, nine hundred ten thousand, three hundred twenty".