67990868 has 18 divisors (see below), whose sum is σ = 130785018. Its totient is φ = 30904720.

The previous prime is 67990849. The next prime is 67990907. The reversal of 67990868 is 86809976.

It can be written as a sum of positive squares in only one way, i.e., 43270084 + 24720784 = 6578^2 + 4972^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 69755 + ... + 70722.

Almost surely, 2^67990868 is an apocalyptic number.

It is an amenable number.

67990868 is a deficient number, since it is larger than the sum of its proper divisors (62794150).

67990868 is a wasteful number, since it uses less digits than its factorization.

67990868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 140503 (or 140490 counting only the distinct ones).

The product of its (nonzero) digits is 1306368, while the sum is 53.

The square root of 67990868 is about 8245.6575238122. The cubic root of 67990868 is about 408.1472379647.

It can be divided in two parts, 679908 and 68, that added together give a palindrome (679976).

The spelling of 67990868 in words is "sixty-seven million, nine hundred ninety thousand, eight hundred sixty-eight".