68020992 has 144 divisors (see below), whose sum is σ = 216909280. Its totient is φ = 20901888.

The previous prime is 68020957. The next prime is 68020993. The reversal of 68020992 is 29902086.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68020993) 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, 89478 + ... + 90234.

Almost surely, 2^68020992 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 68020992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (108454640).

68020992 is an abundant number, since it is smaller than the sum of its proper divisors (148888288).

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

68020992 is a wasteful number, since it uses less digits than its factorization.

68020992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795 (or 775 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 68020992 is about 8247.4839799784. The cubic root of 68020992 is about 408.2075069018.

The spelling of 68020992 in words is "sixty-eight million, twenty thousand, nine hundred ninety-two".