285190965 has 24 divisors (see below), whose sum is σ = 496401048. Its totient is φ = 151464960.

The previous prime is 285190949. The next prime is 285190981. The reversal of 285190965 is 569091582.

It is an interprime number because it is at equal distance from previous prime (285190949) and next prime (285190981).

It can be written as a sum of positive squares in 4 ways, for example, as 51926436 + 233264529 = 7206^2 + 15273^2 .

It is not a de Polignac number, because 285190965 - 2⁴ = 285190949 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 285190965.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2304 + ... + 23993.

It is an arithmetic number, because the mean of its divisors is an integer number (20683377).

Almost surely, 2^285190965 is an apocalyptic number.

It is an amenable number.

285190965 is a deficient number, since it is larger than the sum of its proper divisors (211210083).

285190965 is a wasteful number, since it uses less digits than its factorization.

285190965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26549 (or 26546 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 45.

The square root of 285190965 is about 16887.5979641866. The cubic root of 285190965 is about 658.2313874436.

The spelling of 285190965 in words is "two hundred eighty-five million, one hundred ninety thousand, nine hundred sixty-five".