6390915 has 8 divisors (see below), whose sum is σ = 10225488. Its totient is φ = 3408480.

The previous prime is 6390907. The next prime is 6390947. The reversal of 6390915 is 5190936.

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

It is not a de Polignac number, because 6390915 - 2³ = 6390907 is a prime.

6390915 is a lucky number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 213016 + ... + 213045.

It is an arithmetic number, because the mean of its divisors is an integer number (1278186).

Almost surely, 2^6390915 is an apocalyptic number.

6390915 is a deficient number, since it is larger than the sum of its proper divisors (3834573).

6390915 is a wasteful number, since it uses less digits than its factorization.

6390915 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 426069.

The product of its (nonzero) digits is 7290, while the sum is 33.

The square root of 6390915 is about 2528.0259096774. The cubic root of 6390915 is about 185.5756600036.

The spelling of 6390915 in words is "six million, three hundred ninety thousand, nine hundred fifteen".