1298398926 has 16 divisors (see below), whose sum is σ = 2832870528. Its totient is φ = 393454200.

The previous prime is 1298398903. The next prime is 1298398957. The reversal of 1298398926 is 6298938921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9836290 + ... + 9836421.

It is an arithmetic number, because the mean of its divisors is an integer number (177054408).

Almost surely, 2^1298398926 is an apocalyptic number.

1298398926 is an abundant number, since it is smaller than the sum of its proper divisors (1534471602).

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

1298398926 is a wasteful number, since it uses less digits than its factorization.

1298398926 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19672727.

The product of its digits is 3359232, while the sum is 57.

The square root of 1298398926 is about 36033.3030126299. The cubic root of 1298398926 is about 1090.9446475166.

The spelling of 1298398926 in words is "one billion, two hundred ninety-eight million, three hundred ninety-eight thousand, nine hundred twenty-six".