1264444412 has 144 divisors (see below), whose sum is σ = 3003340032. Its totient is φ = 459486720.

The previous prime is 1264444397. The next prime is 1264444421. The reversal of 1264444412 is 2144444621.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2131988 + ... + 2132580.

It is an arithmetic number, because the mean of its divisors is an integer number (20856528).

Almost surely, 2^1264444412 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 1264444412, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1501670016).

1264444412 is an abundant number, since it is smaller than the sum of its proper divisors (1738895620).

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

1264444412 is a wasteful number, since it uses less digits than its factorization.

1264444412 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 688 (or 679 counting only the distinct ones).

The product of its digits is 24576, while the sum is 32.

The square root of 1264444412 is about 35559.0271520468. The cubic root of 1264444412 is about 1081.3507367937.

The spelling of 1264444412 in words is "one billion, two hundred sixty-four million, four hundred forty-four thousand, four hundred twelve".