68995638 has 20 divisors (see below), whose sum is σ = 154601700. Its totient is φ = 22998492.

The previous prime is 68995637. The next prime is 68995651. The reversal of 68995638 is 83659986.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68995637) by changing a digit.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 212788 + ... + 213111.

It is an arithmetic number, because the mean of its divisors is an integer number (7730085).

Almost surely, 2^68995638 is an apocalyptic number.

68995638 is an abundant number, since it is smaller than the sum of its proper divisors (85606062).

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

68995638 is a wasteful number, since it uses less digits than its factorization.

68995638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425913 (or 425904 counting only the distinct ones).

The product of its digits is 2799360, while the sum is 54.

The square root of 68995638 is about 8306.3612972227. The cubic root of 68995638 is about 410.1479497782.

The spelling of 68995638 in words is "sixty-eight million, nine hundred ninety-five thousand, six hundred thirty-eight".