68801920 has 128 divisors (see below), whose sum is σ = 186170400. Its totient is φ = 24084480.

The previous prime is 68801903. The next prime is 68801921. The reversal of 68801920 is 2910886.

It is a tau number, because it is divible by the number of its divisors (128).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68801921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 203992 + ... + 204328.

Almost surely, 2^68801920 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68801920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (93085200).

68801920 is an abundant number, since it is smaller than the sum of its proper divisors (117368480).

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

68801920 is a wasteful number, since it uses less digits than its factorization.

68801920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 396 (or 384 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 34.

The square root of 68801920 is about 8294.6922788009. The cubic root of 68801920 is about 409.7637345884.

The spelling of 68801920 in words is "sixty-eight million, eight hundred one thousand, nine hundred twenty".