68907644 has 24 divisors (see below), whose sum is σ = 130098528. Its totient is φ = 31746240.

The previous prime is 68907589. The next prime is 68907649. The reversal of 68907644 is 44670986.

It is a junction number, because it is equal to n+sod(n) for n = 68907595 and 68907604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68907649) 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, 44849 + ... + 46359.

It is an arithmetic number, because the mean of its divisors is an integer number (5420772).

Almost surely, 2^68907644 is an apocalyptic number.

It is an amenable number.

68907644 is a deficient number, since it is larger than the sum of its proper divisors (61190884).

68907644 is a wasteful number, since it uses less digits than its factorization.

68907644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2405 (or 2403 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 44.

The square root of 68907644 is about 8301.0628235184. The cubic root of 68907644 is about 409.9735140535.

The spelling of 68907644 in words is "sixty-eight million, nine hundred seven thousand, six hundred forty-four".