681385338 has 64 divisors (see below), whose sum is σ = 1535760000. Its totient is φ = 223921152.

The previous prime is 681385337. The next prime is 681385361. The reversal of 681385338 is 833583186.

681385338 is a `hidden beast` number, since 6 + 81 + 38 + 533 + 8 = 666.

It is a junction number, because it is equal to n+sod(n) for n = 681385293 and 681385302.

It is not an unprimeable number, because it can be changed into a prime (681385337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1517338 + ... + 1517786.

It is an arithmetic number, because the mean of its divisors is an integer number (23996250).

Almost surely, 2^681385338 is an apocalyptic number.

681385338 is an abundant number, since it is smaller than the sum of its proper divisors (854374662).

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

681385338 is a wasteful number, since it uses less digits than its factorization.

681385338 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796 (or 790 counting only the distinct ones).

The product of its digits is 414720, while the sum is 45.

The square root of 681385338 is about 26103.3587494023. The cubic root of 681385338 is about 879.9626955605.

The spelling of 681385338 in words is "six hundred eighty-one million, three hundred eighty-five thousand, three hundred thirty-eight".