840470 has 8 divisors (see below), whose sum is σ = 1512864. Its totient is φ = 336184.

The previous prime is 840467. The next prime is 840473. The reversal of 840470 is 74048.

840470 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (840467) and next prime (840473).

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

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 840470.

It is not an unprimeable number, because it can be changed into a prime (840473) 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, 42014 + ... + 42033.

It is an arithmetic number, because the mean of its divisors is an integer number (189108).

2⁸⁴⁰⁴⁷⁰ is an apocalyptic number.

840470 is a deficient number, since it is larger than the sum of its proper divisors (672394).

840470 is a wasteful number, since it uses less digits than its factorization.

840470 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84054.

The product of its (nonzero) digits is 896, while the sum is 23.

The square root of 840470 is about 916.7715091559. The cubic root of 840470 is about 94.3714740726.

The spelling of 840470 in words is "eight hundred forty thousand, four hundred seventy".