402589085 has 4 divisors (see below), whose sum is σ = 483106908. Its totient is φ = 322071264.

The previous prime is 402589073. The next prime is 402589129. The reversal of 402589085 is 580985204.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 110965156 + 291623929 = 10534^2 + 17077^2 .

It is a cyclic number.

It is not a de Polignac number, because 402589085 - 2⁶ = 402589021 is a prime.

It is a super-2 number, since 2×402589085² = 324155942722274450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 40258904 + ... + 40258913.

It is an arithmetic number, because the mean of its divisors is an integer number (120776727).

Almost surely, 2^402589085 is an apocalyptic number.

It is an amenable number.

402589085 is a deficient number, since it is larger than the sum of its proper divisors (80517823).

402589085 is an equidigital number, since it uses as much as digits as its factorization.

402589085 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80517822.

The product of its (nonzero) digits is 115200, while the sum is 41.

The square root of 402589085 is about 20064.6227225931. The cubic root of 402589085 is about 738.3925938753.

The spelling of 402589085 in words is "four hundred two million, five hundred eighty-nine thousand, eighty-five".