6863990 has 16 divisors (see below), whose sum is σ = 14120352. Its totient is φ = 2353344.

The previous prime is 6863957. The next prime is 6863993. The reversal of 6863990 is 993686.

It is a super-3 number, since 3×6863990³ (a number of 21 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6863993) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 48959 + ... + 49098.

It is an arithmetic number, because the mean of its divisors is an integer number (882522).

Almost surely, 2^6863990 is an apocalyptic number.

6863990 is an abundant number, since it is smaller than the sum of its proper divisors (7256362).

6863990 is a wasteful number, since it uses less digits than its factorization.

6863990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98071.

The product of its (nonzero) digits is 69984, while the sum is 41.

The square root of 6863990 is about 2619.9217545568. The cubic root of 6863990 is about 190.0460645466.

The spelling of 6863990 in words is "six million, eight hundred sixty-three thousand, nine hundred ninety".