68278890 has 32 divisors (see below), whose sum is σ = 164707200. Its totient is φ = 18114624.

The previous prime is 68278879. The next prime is 68278897. The reversal of 68278890 is 9887286.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (68278897) 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, 252 + ... + 11688.

It is an arithmetic number, because the mean of its divisors is an integer number (5147100).

Almost surely, 2^68278890 is an apocalyptic number.

68278890 is an abundant number, since it is smaller than the sum of its proper divisors (96428310).

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

68278890 is a wasteful number, since it uses less digits than its factorization.

68278890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11646.

The product of its (nonzero) digits is 387072, while the sum is 48.

The square root of 68278890 is about 8263.1041382764. The cubic root of 68278890 is about 408.7227553407.

The spelling of 68278890 in words is "sixty-eight million, two hundred seventy-eight thousand, eight hundred ninety".