68442790 has 16 divisors (see below), whose sum is σ = 132673968. Its totient is φ = 25271136.

The previous prime is 68442767. The next prime is 68442791. The reversal of 68442790 is 9724486.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68442791) by changing a digit.

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, 263112 + ... + 263371.

It is an arithmetic number, because the mean of its divisors is an integer number (8292123).

Almost surely, 2^68442790 is an apocalyptic number.

68442790 is a deficient number, since it is larger than the sum of its proper divisors (64231178).

68442790 is a wasteful number, since it uses less digits than its factorization.

68442790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526503.

The product of its (nonzero) digits is 96768, while the sum is 40.

The square root of 68442790 is about 8273.0157741902. The cubic root of 68442790 is about 409.0495333986.

The spelling of 68442790 in words is "sixty-eight million, four hundred forty-two thousand, seven hundred ninety".