67820530 has 16 divisors (see below), whose sum is σ = 124675200. Its totient is φ = 26550832.

The previous prime is 67820521. The next prime is 67820539. The reversal of 67820530 is 3502876.

It is an interprime number because it is at equal distance from previous prime (67820521) and next prime (67820539).

It is a junction number, because it is equal to n+sod(n) for n = 67820492 and 67820501.

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, 71680 + ... + 72619.

It is an arithmetic number, because the mean of its divisors is an integer number (7792200).

Almost surely, 2^67820530 is an apocalyptic number.

67820530 is a deficient number, since it is larger than the sum of its proper divisors (56854670).

67820530 is a wasteful number, since it uses less digits than its factorization.

67820530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144353.

The product of its (nonzero) digits is 10080, while the sum is 31.

The square root of 67820530 is about 8235.3220944903. The cubic root of 67820530 is about 407.8061082120.

The spelling of 67820530 in words is "sixty-seven million, eight hundred twenty thousand, five hundred thirty".