1264400232 has 64 divisors (see below), whose sum is σ = 3274992000. Its totient is φ = 406312704.

The previous prime is 1264400231. The next prime is 1264400233. The reversal of 1264400232 is 2320044621.

It is an interprime number because it is at equal distance from previous prime (1264400231) and next prime (1264400233).

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

It is not an unprimeable number, because it can be changed into a prime (1264400231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 738994 + ... + 740702.

It is an arithmetic number, because the mean of its divisors is an integer number (51171750).

Almost surely, 2^1264400232 is an apocalyptic number.

1264400232 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 1264400232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1637496000).

1264400232 is an abundant number, since it is smaller than the sum of its proper divisors (2010591768).

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

1264400232 is a wasteful number, since it uses less digits than its factorization.

1264400232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2810 (or 2806 counting only the distinct ones).

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

The square root of 1264400232 is about 35558.4059260254. The cubic root of 1264400232 is about 1081.3381424264.

Adding to 1264400232 its reverse (2320044621), we get a palindrome (3584444853).

The spelling of 1264400232 in words is "one billion, two hundred sixty-four million, four hundred thousand, two hundred thirty-two".