1270907440 has 40 divisors (see below), whose sum is σ = 3223485648. Its totient is φ = 462147840.

The previous prime is 1270907431. The next prime is 1270907453. The reversal of 1270907440 is 447090721.

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 (34) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 1270907396 and 1270907405.

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, 721227 + ... + 722986.

Almost surely, 2^1270907440 is an apocalyptic number.

1270907440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1270907440 is an abundant number, since it is smaller than the sum of its proper divisors (1952578208).

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

1270907440 is a wasteful number, since it uses less digits than its factorization.

1270907440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1444237 (or 1444231 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 1270907440 is about 35649.7887791779. The cubic root of 1270907440 is about 1083.1899968676.

The spelling of 1270907440 in words is "one billion, two hundred seventy million, nine hundred seven thousand, four hundred forty".