840634347 has 96 divisors (see below), whose sum is σ = 1443532800. Its totient is φ = 434367360.

The previous prime is 840634297. The next prime is 840634367. The reversal of 840634347 is 743436048.

It is not a de Polignac number, because 840634347 - 2⁶ = 840634283 is a prime.

It is a super-2 number, since 2×840634347² = 1413332210712232818, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840634367) 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 95 ways as a sum of consecutive naturals, for example, 11515503 + ... + 11515575.

It is an arithmetic number, because the mean of its divisors is an integer number (15036800).

Almost surely, 2^840634347 is an apocalyptic number.

840634347 is a deficient number, since it is larger than the sum of its proper divisors (602898453).

840634347 is a wasteful number, since it uses less digits than its factorization.

840634347 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 133 counting only the distinct ones).

The product of its (nonzero) digits is 193536, while the sum is 39.

The square root of 840634347 is about 28993.6949525237. The cubic root of 840634347 is about 943.7762486040.

It can be divided in two parts, 84063 and 4347, that added together give a triangular number (88410 = T₄₂₀).

The spelling of 840634347 in words is "eight hundred forty million, six hundred thirty-four thousand, three hundred forty-seven".