6503994 has 48 divisors (see below), whose sum is σ = 16511040.
Its totient is φ = 1811520.
The previous prime is 6503977. The next prime is 6504011. The reversal of 6503994 is 4993056.
It is an interprime number because it is at equal distance from previous prime (6503977) and next prime (6504011).
It is an unprimeable number.
It is a pernicious number, because its binary representation contains a prime number (13) of ones.
It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4537 + ... + 5795.
It is an arithmetic number, because the mean of its divisors is an integer number (343980).
Almost surely, 26503994 is an apocalyptic number.
It is a practical number, because each smaller number is the sum of distinct divisors of 6503994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8255520).
6503994 is an abundant number, since it is smaller than the sum of its proper divisors (10007046).
It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.
6503994 is a wasteful number, since it uses less digits than its factorization.
6503994 is an odious number, because the sum of its binary digits is odd.
The sum of its prime factors is 1315 (or 1312 counting only the distinct ones).
The product of its (nonzero) digits is 29160, while the sum is 36.
The square root of 6503994 is about 2550.2929243520.
The cubic root of 6503994 is about 186.6637747568.
The spelling of 6503994 in words is "six million, five hundred three thousand, nine hundred ninety-four".