68790890 has 32 divisors (see below), whose sum is σ = 142404480. Its totient is φ = 23436864.

The previous prime is 68790889. The next prime is 68790899. The reversal of 68790890 is 9809786.

It is not an unprimeable number, because it can be changed into a prime (68790899) 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, 8396 + ... + 14424.

It is an arithmetic number, because the mean of its divisors is an integer number (4450140).

Almost surely, 2^68790890 is an apocalyptic number.

68790890 is an abundant number, since it is smaller than the sum of its proper divisors (73613590).

68790890 is a wasteful number, since it uses less digits than its factorization.

68790890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6206.

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 68790890 is about 8294.0273691374. The cubic root of 68790890 is about 409.7418362870.

The spelling of 68790890 in words is "sixty-eight million, seven hundred ninety thousand, eight hundred ninety".