1299794400 has 432 divisors, whose sum is σ = 4913685504. Its totient is φ = 322544640.

The previous prime is 1299794383. The next prime is 1299794401. The reversal of 1299794400 is 44979921.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1299794401) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 7783117 + ... + 7783283.

It is an arithmetic number, because the mean of its divisors is an integer number (11374272).

Almost surely, 2^1299794400 is an apocalyptic number.

1299794400 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 1299794400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2456842752).

1299794400 is an abundant number, since it is smaller than the sum of its proper divisors (3613891104).

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

1299794400 is a wasteful number, since it uses less digits than its factorization.

1299794400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 263 (or 247 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 1299794400 is about 36052.6614828919. The cubic root of 1299794400 is about 1091.3353440336.

The spelling of 1299794400 in words is "one billion, two hundred ninety-nine million, seven hundred ninety-four thousand, four hundred".