1291898330 has 16 divisors (see below), whose sum is σ = 2326381344. Its totient is φ = 516545040.

The previous prime is 1291898317. The next prime is 1291898359. The reversal of 1291898330 is 338981921.

1291898330 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon 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, 212 + ... + 50831.

It is an arithmetic number, because the mean of its divisors is an integer number (145398834).

Almost surely, 2^1291898330 is an apocalyptic number.

1291898330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1291898330 is a deficient number, since it is larger than the sum of its proper divisors (1034483014).

1291898330 is a wasteful number, since it uses less digits than its factorization.

1291898330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53581.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 1291898330 is about 35942.9872158673. The cubic root of 1291898330 is about 1089.1209504976.

The spelling of 1291898330 in words is "one billion, two hundred ninety-one million, eight hundred ninety-eight thousand, three hundred thirty".