285140537 has 8 divisors (see below), whose sum is σ = 319469952. Its totient is φ = 252212400.

The previous prime is 285140519. The next prime is 285140539. The reversal of 285140537 is 735041582.

It is a happy number.

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

It is not a de Polignac number, because 285140537 - 2²⁰ = 284091961 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 285140497 and 285140506.

It is not an unprimeable number, because it can be changed into a prime (285140539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 349889 + ... + 350702.

It is an arithmetic number, because the mean of its divisors is an integer number (39933744).

Almost surely, 2^285140537 is an apocalyptic number.

It is an amenable number.

285140537 is a deficient number, since it is larger than the sum of its proper divisors (34329415).

285140537 is a wasteful number, since it uses less digits than its factorization.

285140537 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700639.

The product of its (nonzero) digits is 33600, while the sum is 35.

The square root of 285140537 is about 16886.1048498462. The cubic root of 285140537 is about 658.1925885882.

The spelling of 285140537 in words is "two hundred eighty-five million, one hundred forty thousand, five hundred thirty-seven".