7256440 has 32 divisors (see below), whose sum is σ = 16771680. Its totient is φ = 2823552.

The previous prime is 7256401. The next prime is 7256497. The reversal of 7256440 is 446527.

It is a junction number, because it is equal to n+sod(n) for n = 7256399 and 7256408.

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, 972 + ... + 3931.

It is an arithmetic number, because the mean of its divisors is an integer number (524115).

Almost surely, 2^7256440 is an apocalyptic number.

It is an amenable number.

7256440 is an abundant number, since it is smaller than the sum of its proper divisors (9515240).

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

7256440 is a wasteful number, since it uses less digits than its factorization.

7256440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4951 (or 4947 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 7256440 is about 2693.7780160956. The cubic root of 7256440 is about 193.6011218431.

The spelling of 7256440 in words is "seven million, two hundred fifty-six thousand, four hundred forty".