1264439748 has 72 divisors (see below), whose sum is σ = 3485262816. Its totient is φ = 353683200.

The previous prime is 1264439707. The next prime is 1264439767. The reversal of 1264439748 is 8479344621.

It is a junction number, because it is equal to n+sod(n) for n = 1264439697 and 1264439706.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6033 + ... + 50648.

It is an arithmetic number, because the mean of its divisors is an integer number (48406428).

Almost surely, 2^1264439748 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 1264439748, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1742631408).

1264439748 is an abundant number, since it is smaller than the sum of its proper divisors (2220823068).

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

1264439748 is a wasteful number, since it uses less digits than its factorization.

1264439748 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56725 (or 56710 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 48.

The square root of 1264439748 is about 35558.9615708896. The cubic root of 1264439748 is about 1081.3494072437.

The spelling of 1264439748 in words is "one billion, two hundred sixty-four million, four hundred thirty-nine thousand, seven hundred forty-eight".