1264239396 has 216 divisors, whose sum is σ = 3910583040. Its totient is φ = 342921600.

The previous prime is 1264239373. The next prime is 1264239401. The reversal of 1264239396 is 6939324621.

1264239396 is a `hidden beast` number, since 1 + 26 + 4 + 239 + 396 = 666.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3335535 + ... + 3335913.

Almost surely, 2^1264239396 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 1264239396, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1955291520).

1264239396 is an abundant number, since it is smaller than the sum of its proper divisors (2646343644).

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

1264239396 is a wasteful number, since it uses less digits than its factorization.

1264239396 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 495 (or 483 counting only the distinct ones).

The product of its digits is 419904, while the sum is 45.

The square root of 1264239396 is about 35556.1442791538. The cubic root of 1264239396 is about 1081.2922905218.

The spelling of 1264239396 in words is "one billion, two hundred sixty-four million, two hundred thirty-nine thousand, three hundred ninety-six".