1297730800 has 30 divisors (see below), whose sum is σ = 3117799208. Its totient is φ = 519092160.

The previous prime is 1297730789. The next prime is 1297730803. The reversal of 1297730800 is 80377921.

It is a self number, because there is not a number n which added to its sum of digits gives 1297730800.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297730803) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1621764 + ... + 1622563.

Almost surely, 2^1297730800 is an apocalyptic number.

1297730800 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1297730800 is an abundant number, since it is smaller than the sum of its proper divisors (1820068408).

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

1297730800 is a wasteful number, since it uses less digits than its factorization.

1297730800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3244345 (or 3244334 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 1297730800 is about 36024.0308682968. The cubic root of 1297730800 is about 1090.7574904655.

The spelling of 1297730800 in words is "one billion, two hundred ninety-seven million, seven hundred thirty thousand, eight hundred".