1297658880 has 528 divisors, whose sum is σ = 5364777600. Its totient is φ = 294617088.

The previous prime is 1297658867. The next prime is 1297658899. The reversal of 1297658880 is 888567921.

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 (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8709046 + ... + 8709194.

Almost surely, 2^1297658880 is an apocalyptic number.

1297658880 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 1297658880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2682388800).

1297658880 is an abundant number, since it is smaller than the sum of its proper divisors (4067118720).

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

1297658880 is an equidigital number, since it uses as much as digits as its factorization.

1297658880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 196 (or 166 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 54.

The square root of 1297658880 is about 36023.0326319148. The cubic root of 1297658880 is about 1090.7373402340.

The spelling of 1297658880 in words is "one billion, two hundred ninety-seven million, six hundred fifty-eight thousand, eight hundred eighty".