1298750790 has 64 divisors (see below), whose sum is σ = 3243499200. Its totient is φ = 332419584.

The previous prime is 1298750779. The next prime is 1298750807. The reversal of 1298750790 is 970578921.

It is a super-2 number, since 2×1298750790² = 3373507229051248200, which contains 22 as substring.

It is a Curzon number.

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, 146196 + ... + 154824.

It is an arithmetic number, because the mean of its divisors is an integer number (50679675).

Almost surely, 2^1298750790 is an apocalyptic number.

1298750790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1298750790, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1621749600).

1298750790 is an abundant number, since it is smaller than the sum of its proper divisors (1944748410).

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

1298750790 is a wasteful number, since it uses less digits than its factorization.

1298750790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8841.

The product of its (nonzero) digits is 317520, while the sum is 48.

The square root of 1298750790 is about 36038.1851651828. The cubic root of 1298750790 is about 1091.0431866916.

The spelling of 1298750790 in words is "one billion, two hundred ninety-eight million, seven hundred fifty thousand, seven hundred ninety".