1270780398 has 12 divisors (see below), whose sum is σ = 2753357568. Its totient is φ = 423593460.

The previous prime is 1270780397. The next prime is 1270780403. The reversal of 1270780398 is 8930870721.

It is a super-2 number, since 2×1270780398² = 3229765639882076808, which contains 22 as substring.

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1270780393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 35299438 + ... + 35299473.

It is an arithmetic number, because the mean of its divisors is an integer number (229446464).

Almost surely, 2^1270780398 is an apocalyptic number.

1270780398 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

1270780398 is an abundant number, since it is smaller than the sum of its proper divisors (1482577170).

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

1270780398 is a wasteful number, since it uses less digits than its factorization.

1270780398 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 70598919 (or 70598916 counting only the distinct ones).

The product of its (nonzero) digits is 169344, while the sum is 45.

The square root of 1270780398 is about 35648.0069288593. The cubic root of 1270780398 is about 1083.1539031798.

The spelling of 1270780398 in words is "one billion, two hundred seventy million, seven hundred eighty thousand, three hundred ninety-eight".