68990 has 8 divisors (see below), whose sum is σ = 124200. Its totient is φ = 27592.

The previous prime is 68963. The next prime is 68993. The reversal of 68990 is 9986.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68993) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3440 + ... + 3459.

It is an arithmetic number, because the mean of its divisors is an integer number (15525).

2⁶⁸⁹⁹⁰ is an apocalyptic number.

68990 is a deficient number, since it is larger than the sum of its proper divisors (55210).

68990 is a wasteful number, since it uses less digits than its factorization.

68990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6906.

The product of its (nonzero) digits is 3888, while the sum is 32.

The square root of 68990 is about 262.6594753669. The cubic root of 68990 is about 41.0136777685.

The spelling of 68990 in words is "sixty-eight thousand, nine hundred ninety".