6392990 has 8 divisors (see below), whose sum is σ = 11507400. Its totient is φ = 2557192.

The previous prime is 6392989. The next prime is 6392999. The reversal of 6392990 is 992936.

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

It is a super-2 number, since 2×6392990² = 81740642280200, which contains 22 as substring.

It is a d-powerful number, because it can be written as 6³ + 3¹³ + 9³ + 2¹³ + 9⁴ + 9⁷ + 0 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6392999) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 319640 + ... + 319659.

It is an arithmetic number, because the mean of its divisors is an integer number (1438425).

Almost surely, 2^6392990 is an apocalyptic number.

6392990 is a deficient number, since it is larger than the sum of its proper divisors (5114410).

6392990 is a wasteful number, since it uses less digits than its factorization.

6392990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 639306.

The product of its (nonzero) digits is 26244, while the sum is 38.

The square root of 6392990 is about 2528.4362756455. The cubic root of 6392990 is about 185.5957420434.

The spelling of 6392990 in words is "six million, three hundred ninety-two thousand, nine hundred ninety".