1002566394 has 24 divisors (see below), whose sum is σ = 2173803060. Its totient is φ = 333946368.

The previous prime is 1002566333. The next prime is 1002566401. The reversal of 1002566394 is 4936652001.

It is a happy number.

1002566394 is a `hidden beast` number, since 1 + 0 + 0 + 2 + 566 + 3 + 94 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 747749025 + 254817369 = 27345^2 + 15963^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6234 + ... + 45210.

Almost surely, 2^1002566394 is an apocalyptic number.

1002566394 is an abundant number, since it is smaller than the sum of its proper divisors (1171236666).

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

1002566394 is a wasteful number, since it uses less digits than its factorization.

1002566394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40414 (or 40411 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 36.

The square root of 1002566394 is about 31663.3288521596. The cubic root of 1002566394 is about 1000.8547338885.

The spelling of 1002566394 in words is "one billion, two million, five hundred sixty-six thousand, three hundred ninety-four".