8428407 has 8 divisors (see below), whose sum is σ = 12102384. Its totient is φ = 5186688.

The previous prime is 8428403. The next prime is 8428417. The reversal of 8428407 is 7048248.

8428407 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 8428407 - 2² = 8428403 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8428403) 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, 108018 + ... + 108095.

It is an arithmetic number, because the mean of its divisors is an integer number (1512798).

Almost surely, 2^8428407 is an apocalyptic number.

8428407 is a deficient number, since it is larger than the sum of its proper divisors (3673977).

8428407 is a wasteful number, since it uses less digits than its factorization.

8428407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 216129.

The product of its (nonzero) digits is 14336, while the sum is 33.

The square root of 8428407 is about 2903.1718860584. The cubic root of 8428407 is about 203.5081625149.

The spelling of 8428407 in words is "eight million, four hundred twenty-eight thousand, four hundred seven".