1297493838 has 24 divisors (see below), whose sum is σ = 2825810208. Its totient is φ = 430255872.

The previous prime is 1297493833. The next prime is 1297493861. The reversal of 1297493838 is 8383947921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1297493833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 183270 + ... + 190217.

It is an arithmetic number, because the mean of its divisors is an integer number (117742092).

Almost surely, 2^1297493838 is an apocalyptic number.

1297493838 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1297493838 is an abundant number, since it is smaller than the sum of its proper divisors (1528316370).

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

1297493838 is a wasteful number, since it uses less digits than its factorization.

1297493838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 373688 (or 373685 counting only the distinct ones).

The product of its digits is 2612736, while the sum is 54.

The square root of 1297493838 is about 36020.7417747053. The cubic root of 1297493838 is about 1090.6910966726.

The spelling of 1297493838 in words is "one billion, two hundred ninety-seven million, four hundred ninety-three thousand, eight hundred thirty-eight".