1264799800 has 96 divisors (see below), whose sum is σ = 3221914320. Its totient is φ = 457932800.

The previous prime is 1264799719. The next prime is 1264799801. The reversal of 1264799800 is 89974621.

It is a Smith number, since the sum of its digits (46) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264799801) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 564282 + ... + 566518.

Almost surely, 2^1264799800 is an apocalyptic number.

1264799800 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 1264799800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1610957160).

1264799800 is an abundant number, since it is smaller than the sum of its proper divisors (1957114520).

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

1264799800 is a wasteful number, since it uses less digits than its factorization.

1264799800 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2521 (or 2512 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 46.

The square root of 1264799800 is about 35564.0239568022. The cubic root of 1264799800 is about 1081.4520363773.

The spelling of 1264799800 in words is "one billion, two hundred sixty-four million, seven hundred ninety-nine thousand, eight hundred".