681828456 has 32 divisors (see below), whose sum is σ = 1718000640. Its totient is φ = 225485568.

The previous prime is 681828443. The next prime is 681828457. The reversal of 681828456 is 654828186.

It is a happy number.

It is a super-2 number, since 2×681828456² = 929780086822687872, which contains 22 as substring.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (681828457) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108801 + ... + 114896.

It is an arithmetic number, because the mean of its divisors is an integer number (53687520).

Almost surely, 2^681828456 is an apocalyptic number.

It is an amenable number.

681828456 is an abundant number, since it is smaller than the sum of its proper divisors (1036172184).

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

681828456 is a wasteful number, since it uses less digits than its factorization.

681828456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223833 (or 223829 counting only the distinct ones).

The product of its digits is 737280, while the sum is 48.

The square root of 681828456 is about 26111.8451282172. The cubic root of 681828456 is about 880.1534064514.

The spelling of 681828456 in words is "six hundred eighty-one million, eight hundred twenty-eight thousand, four hundred fifty-six".