6436390 has 8 divisors (see below), whose sum is σ = 11585520. Its totient is φ = 2574552.

The previous prime is 6436379. The next prime is 6436447. The reversal of 6436390 is 936346.

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

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, 321810 + ... + 321829.

It is an arithmetic number, because the mean of its divisors is an integer number (1448190).

Almost surely, 2^6436390 is an apocalyptic number.

6436390 is a deficient number, since it is larger than the sum of its proper divisors (5149130).

6436390 is a wasteful number, since it uses less digits than its factorization.

6436390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 643646.

The product of its (nonzero) digits is 11664, while the sum is 31.

The square root of 6436390 is about 2537.0041387432. The cubic root of 6436390 is about 186.0147789544.

The spelling of 6436390 in words is "six million, four hundred thirty-six thousand, three hundred ninety".