285260740 has 12 divisors (see below), whose sum is σ = 599047596. Its totient is φ = 114104288.

The previous prime is 285260653. The next prime is 285260749. The reversal of 285260740 is 47062582.

It can be written as a sum of positive squares in 2 ways, for example, as 73034116 + 212226624 = 8546^2 + 14568^2 .

It is a junction number, because it is equal to n+sod(n) for n = 285260696 and 285260705.

It is not an unprimeable number, because it can be changed into a prime (285260749) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7131499 + ... + 7131538.

It is an arithmetic number, because the mean of its divisors is an integer number (49920633).

Almost surely, 2^285260740 is an apocalyptic number.

285260740 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

285260740 is an abundant number, since it is smaller than the sum of its proper divisors (313786856).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

285260740 is a wasteful number, since it uses less digits than its factorization.

285260740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14263046 (or 14263044 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 34.

The square root of 285260740 is about 16889.6637029871. The cubic root of 285260740 is about 658.2850641674.

The spelling of 285260740 in words is "two hundred eighty-five million, two hundred sixty thousand, seven hundred forty".