1266427400 has 192 divisors, whose sum is σ = 3492931200. Its totient is φ = 418037760.

The previous prime is 1266427343. The next prime is 1266427411. The reversal of 1266427400 is 47246621.

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 6561704 + ... + 6561896.

It is an arithmetic number, because the mean of its divisors is an integer number (18192350).

Almost surely, 2^1266427400 is an apocalyptic number.

1266427400 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 1266427400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1746465600).

1266427400 is an abundant number, since it is smaller than the sum of its proper divisors (2226503800).

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

1266427400 is a wasteful number, since it uses less digits than its factorization.

1266427400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 368 (or 359 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 32.

The square root of 1266427400 is about 35586.8992748736. The cubic root of 1266427400 is about 1081.9157242146.

The spelling of 1266427400 in words is "one billion, two hundred sixty-six million, four hundred twenty-seven thousand, four hundred".