6264640 has 28 divisors (see below), whose sum is σ = 14918436. Its totient is φ = 2505728.

The previous prime is 6264637. The next prime is 6264673. The reversal of 6264640 is 464626.

It can be written as a sum of positive squares in 2 ways, for example, as 4393216 + 1871424 = 2096^2 + 1368^2 .

It is a junction number, because it is equal to n+sod(n) for n = 6264599 and 6264608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9469 + ... + 10108.

Almost surely, 2^6264640 is an apocalyptic number.

It is an amenable number.

6264640 is an abundant number, since it is smaller than the sum of its proper divisors (8653796).

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

6264640 is a wasteful number, since it uses less digits than its factorization.

6264640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19594 (or 19584 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 6264640 is about 2502.9262873684. The cubic root of 6264640 is about 184.3452873694.

The spelling of 6264640 in words is "six million, two hundred sixty-four thousand, six hundred forty".