840347934 has 8 divisors (see below), whose sum is σ = 1680695880. Its totient is φ = 280115976.

The previous prime is 840347929. The next prime is 840347939. The reversal of 840347934 is 439743048.

It is an interprime number because it is at equal distance from previous prime (840347929) and next prime (840347939).

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

840347934 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (840347939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 70028989 + ... + 70029000.

It is an arithmetic number, because the mean of its divisors is an integer number (210086985).

Almost surely, 2^840347934 is an apocalyptic number.

840347934 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

840347934 is a wasteful number, since it uses less digits than its factorization.

840347934 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140057994.

The product of its (nonzero) digits is 290304, while the sum is 42.

The square root of 840347934 is about 28988.7553027032. The cubic root of 840347934 is about 943.6690515837.

The spelling of 840347934 in words is "eight hundred forty million, three hundred forty-seven thousand, nine hundred thirty-four".