1270647864 has 128 divisors (see below), whose sum is σ = 3808296000. Its totient is φ = 391053312.

The previous prime is 1270647841. The next prime is 1270647869. The reversal of 1270647864 is 4687460721.

It is a super-2 number, since 2×1270647864² = 3229091988575524992, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1270647869) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 191352 + ... + 197880.

Almost surely, 2^1270647864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1270647864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1904148000).

1270647864 is an abundant number, since it is smaller than the sum of its proper divisors (2537648136).

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

1270647864 is a wasteful number, since it uses less digits than its factorization.

1270647864 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6614 (or 6604 counting only the distinct ones).

The product of its (nonzero) digits is 451584, while the sum is 45.

The square root of 1270647864 is about 35646.1479545827. The cubic root of 1270647864 is about 1083.1162466053.

The spelling of 1270647864 in words is "one billion, two hundred seventy million, six hundred forty-seven thousand, eight hundred sixty-four".