1264547328 has 80 divisors (see below), whose sum is σ = 3675139776. Its totient is φ = 383191040.

The previous prime is 1264547321. The next prime is 1264547341. The reversal of 1264547328 is 8237454621.

It is a self number, because there is not a number n which added to its sum of digits gives 1264547328.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264547321) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20526 + ... + 54317.

Almost surely, 2^1264547328 is an apocalyptic number.

It is an amenable number.

1264547328 is an abundant number, since it is smaller than the sum of its proper divisors (2410592448).

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

1264547328 is an equidigital number, since it uses as much as digits as its factorization.

1264547328 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74875 (or 74859 counting only the distinct ones).

The product of its digits is 322560, while the sum is 42.

The square root of 1264547328 is about 35560.4742375576. The cubic root of 1264547328 is about 1081.3800738612.

It can be divided in two parts, 126 and 4547328, that added together give a palindrome (4547454).

The spelling of 1264547328 in words is "one billion, two hundred sixty-four million, five hundred forty-seven thousand, three hundred twenty-eight".