68249978 has 16 divisors (see below), whose sum is σ = 105545760. Its totient is φ = 33075216.

The previous prime is 68249977. The next prime is 68249981. The reversal of 68249978 is 87994286.

It is not an unprimeable number, because it can be changed into a prime (68249977) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19313 + ... + 22571.

It is an arithmetic number, because the mean of its divisors is an integer number (6596610).

Almost surely, 2^68249978 is an apocalyptic number.

68249978 is a deficient number, since it is larger than the sum of its proper divisors (37295782).

68249978 is a wasteful number, since it uses less digits than its factorization.

68249978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3581.

The product of its digits is 1741824, while the sum is 53.

The square root of 68249978 is about 8261.3544894285. The cubic root of 68249978 is about 408.6650573679.

The spelling of 68249978 in words is "sixty-eight million, two hundred forty-nine thousand, nine hundred seventy-eight".