67820538 has 16 divisors (see below), whose sum is σ = 142780320. Its totient is φ = 21416976.

The previous prime is 67820521. The next prime is 67820539. The reversal of 67820538 is 83502876.

It is a junction number, because it is equal to n+sod(n) for n = 67820496 and 67820505.

It is not an unprimeable number, because it can be changed into a prime (67820539) 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, 297345 + ... + 297572.

It is an arithmetic number, because the mean of its divisors is an integer number (8923770).

Almost surely, 2^67820538 is an apocalyptic number.

67820538 is an abundant number, since it is smaller than the sum of its proper divisors (74959782).

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

67820538 is a wasteful number, since it uses less digits than its factorization.

67820538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594941.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 67820538 is about 8235.3225802029. The cubic root of 67820538 is about 407.8061242467.

The spelling of 67820538 in words is "sixty-seven million, eight hundred twenty thousand, five hundred thirty-eight".