1266323928 has 32 divisors (see below), whose sum is σ = 3170741760. Its totient is φ = 421450400.

The previous prime is 1266323923. The next prime is 1266323939. The reversal of 1266323928 is 8293236621.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 1266323928.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1266323923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25248 + ... + 56303.

It is an arithmetic number, because the mean of its divisors is an integer number (99085680).

Almost surely, 2^1266323928 is an apocalyptic number.

It is an amenable number.

1266323928 is an abundant number, since it is smaller than the sum of its proper divisors (1904417832).

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

1266323928 is a wasteful number, since it uses less digits than its factorization.

1266323928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82207 (or 82203 counting only the distinct ones).

The product of its digits is 186624, while the sum is 42.

The square root of 1266323928 is about 35585.4454517574. The cubic root of 1266323928 is about 1081.8862578504.

The spelling of 1266323928 in words is "one billion, two hundred sixty-six million, three hundred twenty-three thousand, nine hundred twenty-eight".