1299923320 has 32 divisors (see below), whose sum is σ = 2957698800. Its totient is φ = 514125568.

The previous prime is 1299923311. The next prime is 1299923329. The reversal of 1299923320 is 233299921.

It is an interprime number because it is at equal distance from previous prime (1299923311) and next prime (1299923329).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299923329) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 179014 + ... + 186133.

Almost surely, 2^1299923320 is an apocalyptic number.

1299923320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1299923320 is an abundant number, since it is smaller than the sum of its proper divisors (1657775480).

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

1299923320 is a wasteful number, since it uses less digits than its factorization.

1299923320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365247 (or 365243 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 40.

The square root of 1299923320 is about 36054.4493786828. The cubic root of 1299923320 is about 1091.3714241760.

The spelling of 1299923320 in words is "one billion, two hundred ninety-nine million, nine hundred twenty-three thousand, three hundred twenty".