285347109872 has 20 divisors (see below), whose sum is σ = 603120028056. Its totient is φ = 129703231680.

The previous prime is 285347109869. The next prime is 285347109923. The reversal of 285347109872 is 278901743582.

It is a super-2 number, since 2×285347109872² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 810645023 + ... + 810645374.

Almost surely, 2^285347109872 is an apocalyptic number.

285347109872 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

It is an amenable number.

285347109872 is an abundant number, since it is smaller than the sum of its proper divisors (317772918184).

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

285347109872 is a wasteful number, since it uses less digits than its factorization.

285347109872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1621290416 (or 1621290410 counting only the distinct ones).

The product of its (nonzero) digits is 6773760, while the sum is 56.

It can be divided in two parts, 28534710 and 9872, that added together give a palindrome (28544582).

The spelling of 285347109872 in words is "two hundred eighty-five billion, three hundred forty-seven million, one hundred nine thousand, eight hundred seventy-two".