1266894450 has 72 divisors (see below), whose sum is σ = 3429865296. Its totient is φ = 335244000.

The previous prime is 1266894449. The next prime is 1266894479. The reversal of 1266894450 is 544986621.

1266894450 is a `hidden beast` number, since 126 + 6 + 89 + 445 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a junction number, because it is equal to n+sod(n) for n = 1266894396 and 1266894405.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 48205 + ... + 69695.

It is an arithmetic number, because the mean of its divisors is an integer number (47637018).

Almost surely, 2^1266894450 is an apocalyptic number.

1266894450 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1266894450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1714932648).

1266894450 is an abundant number, since it is smaller than the sum of its proper divisors (2162970846).

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

1266894450 is a wasteful number, since it uses less digits than its factorization.

1266894450 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21640 (or 21632 counting only the distinct ones).

The product of its (nonzero) digits is 414720, while the sum is 45.

The square root of 1266894450 is about 35593.4607758223. The cubic root of 1266894450 is about 1082.0487089751.

The spelling of 1266894450 in words is "one billion, two hundred sixty-six million, eight hundred ninety-four thousand, four hundred fifty".