8256730 has 24 divisors (see below), whose sum is σ = 15793308. Its totient is φ = 3107328.

The previous prime is 8256727. The next prime is 8256749. The reversal of 8256730 is 376528.

It can be written as a sum of positive squares in 6 ways, for example, as 6548481 + 1708249 = 2559^2 + 1307^2 .

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 8256692 and 8256701.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1462 + ... + 4318.

Almost surely, 2^8256730 is an apocalyptic number.

8256730 is a deficient number, since it is larger than the sum of its proper divisors (7536578).

8256730 is a wasteful number, since it uses less digits than its factorization.

8256730 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2898 (or 2881 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 8256730 is about 2873.4526270673. The cubic root of 8256730 is about 202.1169306334.

The spelling of 8256730 in words is "eight million, two hundred fifty-six thousand, seven hundred thirty".