1264358400 has 264 divisors, whose sum is σ = 4246034784. Its totient is φ = 331776000.

The previous prime is 1264358351. The next prime is 1264358419. The reversal of 1264358400 is 48534621.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7756719 + ... + 7756881.

Almost surely, 2^1264358400 is an apocalyptic number.

1264358400 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 1264358400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2123017392).

1264358400 is an abundant number, since it is smaller than the sum of its proper divisors (2981676384).

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

1264358400 is a wasteful number, since it uses less digits than its factorization.

1264358400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 297 (or 274 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 33.

The square root of 1264358400 is about 35557.8177058154. The cubic root of 1264358400 is about 1081.3262171317.

The spelling of 1264358400 in words is "one billion, two hundred sixty-four million, three hundred fifty-eight thousand, four hundred".