68857890 has 32 divisors (see below), whose sum is σ = 170959680. Its totient is φ = 17728704.

The previous prime is 68857889. The next prime is 68857891. The reversal of 68857890 is 9875886.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68857889) and next prime (68857891).

It is not an unprimeable number, because it can be changed into a prime (68857891) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 38704 + ... + 40443.

It is an arithmetic number, because the mean of its divisors is an integer number (5342490).

Almost surely, 2^68857890 is an apocalyptic number.

68857890 is an abundant number, since it is smaller than the sum of its proper divisors (102101790).

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

68857890 is a wasteful number, since it uses less digits than its factorization.

68857890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79186.

The product of its (nonzero) digits is 967680, while the sum is 51.

The square root of 68857890 is about 8298.0654371968. The cubic root of 68857890 is about 409.8748180195.

The spelling of 68857890 in words is "sixty-eight million, eight hundred fifty-seven thousand, eight hundred ninety".