1264403860 has 12 divisors (see below), whose sum is σ = 2655248148. Its totient is φ = 505761536.

The previous prime is 1264403839. The next prime is 1264403869. The reversal of 1264403860 is 683044621.

It can be written as a sum of positive squares in 2 ways, for example, as 469502224 + 794901636 = 21668^2 + 28194^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264403869) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31610077 + ... + 31610116.

It is an arithmetic number, because the mean of its divisors is an integer number (221270679).

Almost surely, 2^1264403860 is an apocalyptic number.

1264403860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1264403860 is an abundant number, since it is smaller than the sum of its proper divisors (1390844288).

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

1264403860 is a wasteful number, since it uses less digits than its factorization.

1264403860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63220202 (or 63220200 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 34.

The square root of 1264403860 is about 35558.4569406492. The cubic root of 1264403860 is about 1081.3391766693.

The spelling of 1264403860 in words is "one billion, two hundred sixty-four million, four hundred three thousand, eight hundred sixty".