7256720 has 20 divisors (see below), whose sum is σ = 16872060. Its totient is φ = 2902656.

The previous prime is 7256719. The next prime is 7256737. The reversal of 7256720 is 276527.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 4734976 + 2521744 = 2176^2 + 1588^2 .

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

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, 45275 + ... + 45434.

It is an arithmetic number, because the mean of its divisors is an integer number (843603).

Almost surely, 2^7256720 is an apocalyptic number.

It is an amenable number.

7256720 is an abundant number, since it is smaller than the sum of its proper divisors (9615340).

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

7256720 is a wasteful number, since it uses less digits than its factorization.

7256720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90722 (or 90716 counting only the distinct ones).

The product of its (nonzero) digits is 5880, while the sum is 29.

The square root of 7256720 is about 2693.8299872115. The cubic root of 7256720 is about 193.6036119354.

The spelling of 7256720 in words is "seven million, two hundred fifty-six thousand, seven hundred twenty".