1264707440 has 40 divisors (see below), whose sum is σ = 3068294688. Its totient is φ = 483887360.

The previous prime is 1264707427. The next prime is 1264707467. The reversal of 1264707440 is 447074621.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1264707440.

It is a congruent number.

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, 341831 + ... + 345510.

Almost surely, 2^1264707440 is an apocalyptic number.

1264707440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264707440 is an abundant number, since it is smaller than the sum of its proper divisors (1803587248).

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

1264707440 is a wasteful number, since it uses less digits than its factorization.

1264707440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 687377 (or 687371 counting only the distinct ones).

The product of its (nonzero) digits is 37632, while the sum is 35.

The square root of 1264707440 is about 35562.7254298655. The cubic root of 1264707440 is about 1081.4257119631.

The spelling of 1264707440 in words is "one billion, two hundred sixty-four million, seven hundred seven thousand, four hundred forty".