68561438 has 32 divisors (see below), whose sum is σ = 116563968. Its totient is φ = 29973600.

The previous prime is 68561419. The next prime is 68561447. The reversal of 68561438 is 83416586.

It is a junction number, because it is equal to n+sod(n) for n = 68561395 and 68561404.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62531 + ... + 63617.

It is an arithmetic number, because the mean of its divisors is an integer number (3642624).

Almost surely, 2^68561438 is an apocalyptic number.

68561438 is a deficient number, since it is larger than the sum of its proper divisors (48002530).

68561438 is a wasteful number, since it uses less digits than its factorization.

68561438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1208.

The product of its digits is 138240, while the sum is 41.

The square root of 68561438 is about 8280.1834520740. The cubic root of 68561438 is about 409.2857642298.

The spelling of 68561438 in words is "sixty-eight million, five hundred sixty-one thousand, four hundred thirty-eight".