1270440420 has 48 divisors (see below), whose sum is σ = 3711899520. Its totient is φ = 324054016.

The previous prime is 1270440403. The next prime is 1270440427. The reversal of 1270440420 is 240440721.

It is a super-2 number, since 2×1270440420² = 3228037721539552800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1270440427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 458925 + ... + 461684.

It is an arithmetic number, because the mean of its divisors is an integer number (77331240).

Almost surely, 2^1270440420 is an apocalyptic number.

1270440420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1270440420 is an abundant number, since it is smaller than the sum of its proper divisors (2441459100).

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

1270440420 is a wasteful number, since it uses less digits than its factorization.

1270440420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 920644 (or 920642 counting only the distinct ones).

The product of its (nonzero) digits is 1792, while the sum is 24.

The square root of 1270440420 is about 35643.2380683910. The cubic root of 1270440420 is about 1083.0573007710.

The spelling of 1270440420 in words is "one billion, two hundred seventy million, four hundred forty thousand, four hundred twenty".