6840407 has 8 divisors (see below), whose sum is σ = 8157696. Its totient is φ = 5608152.

The previous prime is 6840377. The next prime is 6840413. The reversal of 6840407 is 7040486.

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

It is a cyclic number.

It is not a de Polignac number, because 6840407 - 2¹⁶ = 6774871 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 6840407.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6840497) 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, 21083 + ... + 21404.

It is an arithmetic number, because the mean of its divisors is an integer number (1019712).

Almost surely, 2^6840407 is an apocalyptic number.

6840407 is a deficient number, since it is larger than the sum of its proper divisors (1317289).

6840407 is a wasteful number, since it uses less digits than its factorization.

6840407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42517.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 6840407 is about 2615.4171751367. The cubic root of 6840407 is about 189.8281641215.

The spelling of 6840407 in words is "six million, eight hundred forty thousand, four hundred seven".