68506890 has 16 divisors (see below), whose sum is σ = 164416608. Its totient is φ = 18268496.

The previous prime is 68506877. The next prime is 68506891. The reversal of 68506890 is 9860586.

It is not an unprimeable number, because it can be changed into a prime (68506891) 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, 1141752 + ... + 1141811.

It is an arithmetic number, because the mean of its divisors is an integer number (10276038).

Almost surely, 2^68506890 is an apocalyptic number.

68506890 is an abundant number, since it is smaller than the sum of its proper divisors (95909718).

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

68506890 is a wasteful number, since it uses less digits than its factorization.

68506890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2283573.

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 68506890 is about 8276.8889082795. Note that the first 3 decimals coincide. The cubic root of 68506890 is about 409.1771918118.

It can be divided in two parts, 68506 and 890, that added together give a palindrome (69396).

The spelling of 68506890 in words is "sixty-eight million, five hundred six thousand, eight hundred ninety".