1264202880 has 128 divisors (see below), whose sum is σ = 4078710720. Its totient is φ = 333017088.

The previous prime is 1264202873. The next prime is 1264202911. The reversal of 1264202880 is 882024621.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (128).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 155394 + ... + 163326.

Almost surely, 2^1264202880 is an apocalyptic number.

1264202880 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 1264202880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2039355360).

1264202880 is an abundant number, since it is smaller than the sum of its proper divisors (2814507840).

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

1264202880 is an equidigital number, since it uses as much as digits as its factorization.

1264202880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8038 (or 8026 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 33.

The square root of 1264202880 is about 35555.6307776982. The cubic root of 1264202880 is about 1081.2818798223.

The spelling of 1264202880 in words is "one billion, two hundred sixty-four million, two hundred two thousand, eight hundred eighty".