8390406 has 8 divisors (see below), whose sum is σ = 16780824. Its totient is φ = 2796800.

The previous prime is 8390399. The next prime is 8390413. The reversal of 8390406 is 6040938.

It is an interprime number because it is at equal distance from previous prime (8390399) and next prime (8390413).

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

8390406 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 699195 + ... + 699206.

It is an arithmetic number, because the mean of its divisors is an integer number (2097603).

Almost surely, 2^8390406 is an apocalyptic number.

8390406 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.

8390406 is a wasteful number, since it uses less digits than its factorization.

8390406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1398406.

The product of its (nonzero) digits is 5184, while the sum is 30.

The square root of 8390406 is about 2896.6197541272. The cubic root of 8390406 is about 203.2018505577.

The spelling of 8390406 in words is "eight million, three hundred ninety thousand, four hundred six".