1264635396 has 48 divisors (see below), whose sum is σ = 3280603200. Its totient is φ = 421298496.

The previous prime is 1264635377. The next prime is 1264635409. The reversal of 1264635396 is 6935364621.

1264635396 is a `hidden beast` number, since 1 + 2 + 6 + 4 + 635 + 3 + 9 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350176 + ... + 353768.

It is an arithmetic number, because the mean of its divisors is an integer number (68345900).

Almost surely, 2^1264635396 is an apocalyptic number.

It is an amenable number.

1264635396 is an abundant number, since it is smaller than the sum of its proper divisors (2015967804).

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

1264635396 is a wasteful number, since it uses less digits than its factorization.

1264635396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6865 (or 6857 counting only the distinct ones).

The product of its digits is 699840, while the sum is 45.

The square root of 1264635396 is about 35561.7125009469. The cubic root of 1264635396 is about 1081.4051771181.

The spelling of 1264635396 in words is "one billion, two hundred sixty-four million, six hundred thirty-five thousand, three hundred ninety-six".