6289640 has 48 divisors (see below), whose sum is σ = 16467300. Its totient is φ = 2155776.

The previous prime is 6289631. The next prime is 6289663. The reversal of 6289640 is 469826.

It can be written as a sum of positive squares in 2 ways, for example, as 6280036 + 9604 = 2506^2 + 98^2 .

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 6289640.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 356 + ... + 3564.

Almost surely, 2^6289640 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6289640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8233650).

6289640 is an abundant number, since it is smaller than the sum of its proper divisors (10177660).

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

6289640 is a wasteful number, since it uses less digits than its factorization.

6289640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3234 (or 3223 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 35.

The square root of 6289640 is about 2507.9154690699. The cubic root of 6289640 is about 184.5901812104.

The spelling of 6289640 in words is "six million, two hundred eighty-nine thousand, six hundred forty".