6258640 has 20 divisors (see below), whose sum is σ = 14551524. Its totient is φ = 2503424.

The previous prime is 6258631. The next prime is 6258647. The reversal of 6258640 is 468526.

It can be written as a sum of positive squares in 2 ways, for example, as 839056 + 5419584 = 916^2 + 2328^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6258647) 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, 39037 + ... + 39196.

Almost surely, 2^6258640 is an apocalyptic number.

It is an amenable number.

6258640 is an abundant number, since it is smaller than the sum of its proper divisors (8292884).

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

6258640 is a wasteful number, since it uses less digits than its factorization.

6258640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 78246 (or 78240 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 31.

The square root of 6258640 is about 2501.7274032156. The cubic root of 6258640 is about 184.2864159350.

It can be divided in two parts, 62586 and 40, that added together give a palindrome (62626).

The spelling of 6258640 in words is "six million, two hundred fifty-eight thousand, six hundred forty".