68639100 has 36 divisors (see below), whose sum is σ = 198596664. Its totient is φ = 18303680.

The previous prime is 68639093. The next prime is 68639101. The reversal of 68639100 is 193686.

It is a super-2 number, since 2×68639100² = 9422652097620000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68639101) 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, 114099 + ... + 114698.

It is an arithmetic number, because the mean of its divisors is an integer number (5516574).

Almost surely, 2^68639100 is an apocalyptic number.

68639100 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

68639100 is an abundant number, since it is smaller than the sum of its proper divisors (129957564).

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

68639100 is a wasteful number, since it uses less digits than its factorization.

68639100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228814 (or 228807 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 33.

The square root of 68639100 is about 8284.8717551933. The cubic root of 68639100 is about 409.4402434716.

The spelling of 68639100 in words is "sixty-eight million, six hundred thirty-nine thousand, one hundred".