681128834 has 32 divisors (see below), whose sum is σ = 1155798720. Its totient is φ = 299109888.

The previous prime is 681128809. The next prime is 681128839. The reversal of 681128834 is 438821186.

It is a junction number, because it is equal to n+sod(n) for n = 681128791 and 681128800.

It is not an unprimeable number, because it can be changed into a prime (681128839) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35414 + ... + 51150.

It is an arithmetic number, because the mean of its divisors is an integer number (36118710).

Almost surely, 2^681128834 is an apocalyptic number.

681128834 is a deficient number, since it is larger than the sum of its proper divisors (474669886).

681128834 is a wasteful number, since it uses less digits than its factorization.

681128834 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15842.

The product of its digits is 73728, while the sum is 41.

The square root of 681128834 is about 26098.4450494661. The cubic root of 681128834 is about 879.8522625610.

The spelling of 681128834 in words is "six hundred eighty-one million, one hundred twenty-eight thousand, eight hundred thirty-four".