402108786 has 40 divisors (see below), whose sum is σ = 954029340. Its totient is φ = 126150912.

The previous prime is 402108703. The next prime is 402108787. The reversal of 402108786 is 687801204.

It can be written as a sum of positive squares in 2 ways, for example, as 397404225 + 4704561 = 19935^2 + 2169^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 402108786.

It is not an unprimeable number, because it can be changed into a prime (402108787) by changing a digit.

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 19 ways as a sum of consecutive naturals, for example, 70251 + ... + 75758.

Almost surely, 2^402108786 is an apocalyptic number.

402108786 is an abundant number, since it is smaller than the sum of its proper divisors (551920554).

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

402108786 is a wasteful number, since it uses less digits than its factorization.

402108786 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146040 (or 146031 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 402108786 is about 20052.6503485200. The cubic root of 402108786 is about 738.0988366536.

The spelling of 402108786 in words is "four hundred two million, one hundred eight thousand, seven hundred eighty-six".