68221404 has 36 divisors (see below), whose sum is σ = 179948496. Its totient is φ = 21751488.

The previous prime is 68221399. The next prime is 68221409. The reversal of 68221404 is 40412286.

It is an interprime number because it is at equal distance from previous prime (68221399) and next prime (68221409).

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68221409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 40369 + ... + 42024.

Almost surely, 2^68221404 is an apocalyptic number.

It is an amenable number.

68221404 is an abundant number, since it is smaller than the sum of its proper divisors (111727092).

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

68221404 is a wasteful number, since it uses less digits than its factorization.

68221404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82426 (or 82421 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 27.

The square root of 68221404 is about 8259.6249309518. The cubic root of 68221404 is about 408.6080179094.

The spelling of 68221404 in words is "sixty-eight million, two hundred twenty-one thousand, four hundred four".