1299080640 has 224 divisors, whose sum is σ = 4846173696. Its totient is φ = 290672640.

The previous prime is 1299080623. The next prime is 1299080659. The reversal of 1299080640 is 460809921.

It is a super-2 number, since 2×1299080640² = 3375221018445619200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 132549 + ... + 142011.

It is an arithmetic number, because the mean of its divisors is an integer number (21634704).

Almost surely, 2^1299080640 is an apocalyptic number.

1299080640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1299080640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2423086848).

1299080640 is an abundant number, since it is smaller than the sum of its proper divisors (3547093056).

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

1299080640 is a wasteful number, since it uses less digits than its factorization.

1299080640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9507 (or 9497 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 39.

The square root of 1299080640 is about 36042.7612704687. The cubic root of 1299080640 is about 1091.1355447060.

The spelling of 1299080640 in words is "one billion, two hundred ninety-nine million, eighty thousand, six hundred forty".