6256440 has 80 divisors (see below), whose sum is σ = 21039480. Its totient is φ = 1667520.

The previous prime is 6256427. The next prime is 6256469. The reversal of 6256440 is 446526.

It is a happy number.

6256440 is a `hidden beast` number, since 62 + 564 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2275 + ... + 4205.

Almost surely, 2^6256440 is an apocalyptic number.

6256440 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6256440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10519740).

6256440 is an abundant number, since it is smaller than the sum of its proper divisors (14783040).

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

6256440 is a wasteful number, since it uses less digits than its factorization.

6256440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1954 (or 1941 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 6256440 is about 2501.2876683820. The cubic root of 6256440 is about 184.2648203152.

The spelling of 6256440 in words is "six million, two hundred fifty-six thousand, four hundred forty".