68220072 has 24 divisors (see below), whose sum is σ = 184762890. Its totient is φ = 22740000.

The previous prime is 68220067. The next prime is 68220101. The reversal of 68220072 is 27002286.

It can be written as a sum of positive squares in only one way, i.e., 64738116 + 3481956 = 8046^2 + 1866^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 473679 + ... + 473822.

Almost surely, 2^68220072 is an apocalyptic number.

It is an amenable number.

68220072 is an abundant number, since it is smaller than the sum of its proper divisors (116542818).

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

68220072 is a wasteful number, since it uses less digits than its factorization.

68220072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 947513 (or 947506 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 27.

The square root of 68220072 is about 8259.5442973568. The cubic root of 68220072 is about 408.6053585807.

The spelling of 68220072 in words is "sixty-eight million, two hundred twenty thousand, seventy-two".