67638620 has 36 divisors (see below), whose sum is σ = 165233880. Its totient is φ = 23190048.

The previous prime is 67638611. The next prime is 67638629. The reversal of 67638620 is 2683676.

It is an interprime number because it is at equal distance from previous prime (67638611) and next prime (67638629).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (67638629) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 33530 + ... + 35489.

It is an arithmetic number, because the mean of its divisors is an integer number (4589830).

Almost surely, 2^67638620 is an apocalyptic number.

It is an amenable number.

67638620 is an abundant number, since it is smaller than the sum of its proper divisors (97595260).

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

67638620 is a wasteful number, since it uses less digits than its factorization.

67638620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69042 (or 69033 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 38.

The square root of 67638620 is about 8224.2701803868. The cubic root of 67638620 is about 407.4411723327.

The spelling of 67638620 in words is "sixty-seven million, six hundred thirty-eight thousand, six hundred twenty".