1264503240 has 768 divisors, whose sum is σ = 5755276800. Its totient is φ = 234178560.

The previous prime is 1264503169. The next prime is 1264503283. The reversal of 1264503240 is 423054621.

1264503240 is a `hidden beast` number, since 12 + 645 + 0 + 3 + 2 + 4 + 0 = 666.

1264503240 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 43603546 + ... + 43603574.

It is an arithmetic number, because the mean of its divisors is an integer number (7493850).

Almost surely, 2^1264503240 is an apocalyptic number.

1264503240 is a gapful number since it is divisible by the number (10) 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 1264503240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2877638400).

1264503240 is an abundant number, since it is smaller than the sum of its proper divisors (4490773560).

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

1264503240 is a wasteful number, since it uses less digits than its factorization.

1264503240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99 (or 70 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 1264503240 is about 35559.8543304103. The cubic root of 1264503240 is about 1081.3675064025.

Adding to 1264503240 its reverse (423054621), we get a palindrome (1687557861).

The spelling of 1264503240 in words is "one billion, two hundred sixty-four million, five hundred three thousand, two hundred forty".