1264660208 has 80 divisors (see below), whose sum is σ = 2918860800. Its totient is φ = 530357184.

The previous prime is 1264660207. The next prime is 1264660223. The reversal of 1264660208 is 8020664621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264660207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255485 + ... + 260387.

It is an arithmetic number, because the mean of its divisors is an integer number (36485760).

Almost surely, 2^1264660208 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1264660208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1459430400).

1264660208 is an abundant number, since it is smaller than the sum of its proper divisors (1654200592).

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

1264660208 is an equidigital number, since it uses as much as digits as its factorization.

1264660208 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4979 (or 4959 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 35.

The square root of 1264660208 is about 35562.0613575760. The cubic root of 1264660208 is about 1081.4122494200.

The spelling of 1264660208 in words is "one billion, two hundred sixty-four million, six hundred sixty thousand, two hundred eight".