68217290 has 16 divisors (see below), whose sum is σ = 124346880. Its totient is φ = 26941200.

The previous prime is 68217269. The next prime is 68217313. The reversal of 68217290 is 9271286.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 68217290.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42386 + ... + 43965.

It is an arithmetic number, because the mean of its divisors is an integer number (7771680).

Almost surely, 2^68217290 is an apocalyptic number.

68217290 is a deficient number, since it is larger than the sum of its proper divisors (56129590).

68217290 is a wasteful number, since it uses less digits than its factorization.

68217290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86437.

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 68217290 is about 8259.3758844116. The cubic root of 68217290 is about 408.5998042254.

The spelling of 68217290 in words is "sixty-eight million, two hundred seventeen thousand, two hundred ninety".