402763985 has 8 divisors (see below), whose sum is σ = 520495080. Its totient is φ = 297425664.

The previous prime is 402763973. The next prime is 402763993. The reversal of 402763985 is 589367204.

It can be written as a sum of positive squares in 4 ways, for example, as 7907344 + 394856641 = 2812^2 + 19871^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 402763985 - 2¹⁰ = 402762961 is a prime.

It is a super-2 number, since 2×402763985² = 324437655226160450, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3098120 + ... + 3098249.

It is an arithmetic number, because the mean of its divisors is an integer number (65061885).

Almost surely, 2^402763985 is an apocalyptic number.

It is an amenable number.

402763985 is a deficient number, since it is larger than the sum of its proper divisors (117731095).

402763985 is a wasteful number, since it uses less digits than its factorization.

402763985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6196387.

The product of its (nonzero) digits is 362880, while the sum is 44.

The square root of 402763985 is about 20068.9806666906. The cubic root of 402763985 is about 738.4995069968.

The spelling of 402763985 in words is "four hundred two million, seven hundred sixty-three thousand, nine hundred eighty-five".