68638620 has 24 divisors (see below), whose sum is σ = 192188304. Its totient is φ = 18303616.

The previous prime is 68638613. The next prime is 68638631. The reversal of 68638620 is 2683686.

It is a super-2 number, since 2×68638620² = 9422520311008800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 571929 + ... + 572048.

It is an arithmetic number, because the mean of its divisors is an integer number (8007846).

Almost surely, 2^68638620 is an apocalyptic number.

68638620 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68638620 is an abundant number, since it is smaller than the sum of its proper divisors (123549684).

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

68638620 is a wasteful number, since it uses less digits than its factorization.

68638620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1143989 (or 1143987 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 68638620 is about 8284.8427866798. The cubic root of 68638620 is about 409.4392890507.

The spelling of 68638620 in words is "sixty-eight million, six hundred thirty-eight thousand, six hundred twenty".