68067990 has 48 divisors (see below), whose sum is σ = 177454368. Its totient is φ = 18102528.

The previous prime is 68067947. The next prime is 68067991. The reversal of 68067990 is 9976086.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68067991) 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 23 ways as a sum of consecutive naturals, for example, 43054 + ... + 44606.

It is an arithmetic number, because the mean of its divisors is an integer number (3696966).

Almost surely, 2^68067990 is an apocalyptic number.

68067990 is an abundant number, since it is smaller than the sum of its proper divisors (109386378).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68067990 is a wasteful number, since it uses less digits than its factorization.

68067990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2053 (or 2050 counting only the distinct ones).

The product of its (nonzero) digits is 163296, while the sum is 45.

The square root of 68067990 is about 8250.3327205635. The cubic root of 68067990 is about 408.3015000405.

The spelling of 68067990 in words is "sixty-eight million, sixty-seven thousand, nine hundred ninety".