402855663 has 8 divisors (see below), whose sum is σ = 613875328. Its totient is φ = 230203224.

The previous prime is 402855637. The next prime is 402855671. The reversal of 402855663 is 366558204.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 402855663 - 2⁹ = 402855151 is a prime.

It is a super-2 number, since 2×402855663² = 324585370422339138, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (402855623) 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, 9591781 + ... + 9591822.

It is an arithmetic number, because the mean of its divisors is an integer number (76734416).

Almost surely, 2^402855663 is an apocalyptic number.

402855663 is a deficient number, since it is larger than the sum of its proper divisors (211019665).

402855663 is a wasteful number, since it uses less digits than its factorization.

402855663 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19183613.

The product of its (nonzero) digits is 172800, while the sum is 39.

The square root of 402855663 is about 20071.2646088880. The cubic root of 402855663 is about 738.5555356919. Note that the first 4 decimals are identical.

The spelling of 402855663 in words is "four hundred two million, eight hundred fifty-five thousand, six hundred sixty-three".