1299926880 has 720 divisors, whose sum is σ = 5631262560. Its totient is φ = 281014272.

The previous prime is 1299926861. The next prime is 1299926891. The reversal of 1299926880 is 886299921.

It is a tau number, because it is divible by the number of its divisors (720).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 14605876 + ... + 14605964.

It is an arithmetic number, because the mean of its divisors is an integer number (7821198).

Almost surely, 2^1299926880 is an apocalyptic number.

1299926880 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 1299926880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2815631280).

1299926880 is an abundant number, since it is smaller than the sum of its proper divisors (4331335680).

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

1299926880 is a wasteful number, since it uses less digits than its factorization.

1299926880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 153 (or 129 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 54.

The square root of 1299926880 is about 36054.4987484225. The cubic root of 1299926880 is about 1091.3724204601.

The spelling of 1299926880 in words is "one billion, two hundred ninety-nine million, nine hundred twenty-six thousand, eight hundred eighty".