68486890 has 12 divisors (see below), whose sum is σ = 123323526. Its totient is φ = 27384288.

The previous prime is 68486861. The next prime is 68486923. The reversal of 68486890 is 9868486.

It can be written as a sum of positive squares in 3 ways, for example, as 66634569 + 1852321 = 8163^2 + 1361^2 .

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 5 ways as a sum of consecutive naturals, for example, 24862 + ... + 27478.

Almost surely, 2^68486890 is an apocalyptic number.

68486890 is a deficient number, since it is larger than the sum of its proper divisors (54836636).

68486890 is an frugal number, since it uses more digits than its factorization.

68486890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5241 (or 2624 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 49.

The square root of 68486890 is about 8275.6806366606. The cubic root of 68486890 is about 409.1373693436.

The spelling of 68486890 in words is "sixty-eight million, four hundred eighty-six thousand, eight hundred ninety".