681626038 has 4 divisors (see below), whose sum is σ = 1022439060. Its totient is φ = 340813018.

The previous prime is 681626021. The next prime is 681626147. The reversal of 681626038 is 830626186.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×681626038² = 929228111359154888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 170406508 + ... + 170406511.

It is an arithmetic number, because the mean of its divisors is an integer number (255609765).

Almost surely, 2^681626038 is an apocalyptic number.

681626038 is a deficient number, since it is larger than the sum of its proper divisors (340813022).

681626038 is a wasteful number, since it uses less digits than its factorization.

681626038 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340813021.

The product of its (nonzero) digits is 82944, while the sum is 40.

The square root of 681626038 is about 26107.9688601009. The cubic root of 681626038 is about 880.0662992404.

The spelling of 681626038 in words is "six hundred eighty-one million, six hundred twenty-six thousand, thirty-eight".