847012840 has 32 divisors (see below), whose sum is σ = 1923273000. Its totient is φ = 335695104.

The previous prime is 847012823. The next prime is 847012841. The reversal of 847012840 is 48210748.

It can be written as a sum of positive squares in 4 ways, for example, as 598193764 + 248819076 = 24458^2 + 15774^2 .

It is a super-2 number, since 2×847012840² = 1434861502249731200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 847012796 and 847012805.

It is not an unprimeable number, because it can be changed into a prime (847012841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92775 + ... + 101494.

Almost surely, 2^847012840 is an apocalyptic number.

It is an amenable number.

847012840 is an abundant number, since it is smaller than the sum of its proper divisors (1076260160).

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

847012840 is a wasteful number, since it uses less digits than its factorization.

847012840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194389 (or 194385 counting only the distinct ones).

The product of its (nonzero) digits is 14336, while the sum is 34.

The square root of 847012840 is about 29103.4850146851. The cubic root of 847012840 is about 946.1572712971.

The spelling of 847012840 in words is "eight hundred forty-seven million, twelve thousand, eight hundred forty".