1264393670 has 32 divisors (see below), whose sum is σ = 2338592256. Its totient is φ = 491904000.

The previous prime is 1264393639. The next prime is 1264393673. The reversal of 1264393670 is 763934621.

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (41).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264393673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 133595 + ... + 142745.

It is an arithmetic number, because the mean of its divisors is an integer number (73081008).

Almost surely, 2^1264393670 is an apocalyptic number.

1264393670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1264393670 is a deficient number, since it is larger than the sum of its proper divisors (1074198586).

1264393670 is a wasteful number, since it uses less digits than its factorization.

1264393670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9536.

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 1264393670 is about 35558.3136551777. The cubic root of 1264393670 is about 1081.3362717758.

The spelling of 1264393670 in words is "one billion, two hundred sixty-four million, three hundred ninety-three thousand, six hundred seventy".