6213940 has 12 divisors (see below), whose sum is σ = 13049316. Its totient is φ = 2485568.

The previous prime is 6213913. The next prime is 6213947. The reversal of 6213940 is 493126.

It can be written as a sum of positive squares in 2 ways, for example, as 850084 + 5363856 = 922^2 + 2316^2 .

It is a super-2 number, since 2×6213940² = 77226100647200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6213947) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 155329 + ... + 155368.

It is an arithmetic number, because the mean of its divisors is an integer number (1087443).

Almost surely, 2^6213940 is an apocalyptic number.

It is an amenable number.

6213940 is an abundant number, since it is smaller than the sum of its proper divisors (6835376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

6213940 is a wasteful number, since it uses less digits than its factorization.

6213940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310706 (or 310704 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 25.

The square root of 6213940 is about 2492.7775672932. Note that the first 3 decimals coincide. The cubic root of 6213940 is about 183.8466349648.

The spelling of 6213940 in words is "six million, two hundred thirteen thousand, nine hundred forty".