6389140 has 24 divisors (see below), whose sum is σ = 13639752. Its totient is φ = 2513280.

The previous prime is 6389137. The next prime is 6389167. The reversal of 6389140 is 419836.

It can be written as a sum of positive squares in 4 ways, for example, as 298116 + 6091024 = 546^2 + 2468^2 .

It is a super-2 number, since 2×6389140² = 81642219879200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1399 + ... + 3838.

It is an arithmetic number, because the mean of its divisors is an integer number (568323).

Almost surely, 2^6389140 is an apocalyptic number.

It is an amenable number.

6389140 is an abundant number, since it is smaller than the sum of its proper divisors (7250612).

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

6389140 is a wasteful number, since it uses less digits than its factorization.

6389140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5307 (or 5305 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 31.

The square root of 6389140 is about 2527.6748208581. The cubic root of 6389140 is about 185.5584779414.

The spelling of 6389140 in words is "six million, three hundred eighty-nine thousand, one hundred forty".