68284720 has 40 divisors (see below), whose sum is σ = 181443744. Its totient is φ = 23411712.

The previous prime is 68284717. The next prime is 68284753. The reversal of 68284720 is 2748286.

It is a tau number, because it is divible by the number of its divisors (40).

It is a hoax number, since the sum of its digits (37) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 68284720.

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, 60409 + ... + 61528.

Almost surely, 2^68284720 is an apocalyptic number.

It is an amenable number.

68284720 is an abundant number, since it is smaller than the sum of its proper divisors (113159024).

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

68284720 is a wasteful number, since it uses less digits than its factorization.

68284720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121957 (or 121951 counting only the distinct ones).

The product of its (nonzero) digits is 43008, while the sum is 37.

The square root of 68284720 is about 8263.4569037419. The cubic root of 68284720 is about 408.7343879544.

The spelling of 68284720 in words is "sixty-eight million, two hundred eighty-four thousand, seven hundred twenty".