1264040232 has 144 divisors (see below), whose sum is σ = 3929346720. Its totient is φ = 331793280.

The previous prime is 1264040203. The next prime is 1264040251. The reversal of 1264040232 is 2320404621.

It is a super-2 number, since 2×1264040232² = 3195595416229227648, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5990607 + ... + 5990817.

It is an arithmetic number, because the mean of its divisors is an integer number (27287130).

Almost surely, 2^1264040232 is an apocalyptic number.

1264040232 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1264040232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1964673360).

1264040232 is an abundant number, since it is smaller than the sum of its proper divisors (2665306488).

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

1264040232 is a wasteful number, since it uses less digits than its factorization.

1264040232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464 (or 236 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1264040232 is about 35553.3434714655. The cubic root of 1264040232 is about 1081.2355064960.

Adding to 1264040232 its reverse (2320404621), we get a palindrome (3584444853).

The spelling of 1264040232 in words is "one billion, two hundred sixty-four million, forty thousand, two hundred thirty-two".