1276470640 has 40 divisors (see below), whose sum is σ = 2969573328. Its totient is φ = 510282240.

The previous prime is 1276470617. The next prime is 1276470649. The reversal of 1276470640 is 460746721.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Smith number, since the sum of its digits (37) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1276470640.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276470649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 168535 + ... + 175945.

Almost surely, 2^1276470640 is an apocalyptic number.

1276470640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1276470640 is an abundant number, since it is smaller than the sum of its proper divisors (1693102688).

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

1276470640 is a wasteful number, since it uses less digits than its factorization.

1276470640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9577 (or 9571 counting only the distinct ones).

The product of its (nonzero) digits is 56448, while the sum is 37.

The square root of 1276470640 is about 35727.7292869278. The cubic root of 1276470640 is about 1084.7681950094.

The spelling of 1276470640 in words is "one billion, two hundred seventy-six million, four hundred seventy thousand, six hundred forty".