1264805360 has 160 divisors (see below), whose sum is σ = 3671764992. Its totient is φ = 394490880.

The previous prime is 1264805359. The next prime is 1264805383. The reversal of 1264805360 is 635084621.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1264805360.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 515657 + ... + 518103.

Almost surely, 2^1264805360 is an apocalyptic number.

1264805360 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 1264805360, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1835882496).

1264805360 is an abundant number, since it is smaller than the sum of its proper divisors (2406959632).

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

1264805360 is a wasteful number, since it uses less digits than its factorization.

1264805360 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2551 (or 2545 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 35.

The square root of 1264805360 is about 35564.1021255985. The cubic root of 1264805360 is about 1081.4536210456.

Adding to 1264805360 its reverse (635084621), we get a palindrome (1899889981).

The spelling of 1264805360 in words is "one billion, two hundred sixty-four million, eight hundred five thousand, three hundred sixty".