402643863 has 6 divisors (see below), whose sum is σ = 581596704. Its totient is φ = 268429236.

The previous prime is 402643849. The next prime is 402643867. The reversal of 402643863 is 368346204.

It is a happy number.

402643863 is a `hidden beast` number, since 4 + 0 + 2 + 643 + 8 + 6 + 3 = 666.

It is not a de Polignac number, because 402643863 - 2¹⁴ = 402627479 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402643867) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 22369095 + ... + 22369112.

It is an arithmetic number, because the mean of its divisors is an integer number (96932784).

Almost surely, 2^402643863 is an apocalyptic number.

402643863 is a deficient number, since it is larger than the sum of its proper divisors (178952841).

402643863 is a wasteful number, since it uses less digits than its factorization.

402643863 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44738213 (or 44738210 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 402643863 is about 20065.9877155350. The cubic root of 402643863 is about 738.4260819790.

The spelling of 402643863 in words is "four hundred two million, six hundred forty-three thousand, eight hundred sixty-three".