68717420 has 12 divisors (see below), whose sum is σ = 144306624. Its totient is φ = 27486960.

The previous prime is 68717413. The next prime is 68717437. The reversal of 68717420 is 2471786.

It is a happy number.

It is a super-2 number, since 2×68717420² = 9444167622912800, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1717916 + ... + 1717955.

It is an arithmetic number, because the mean of its divisors is an integer number (12025552).

Almost surely, 2^68717420 is an apocalyptic number.

It is an amenable number.

68717420 is an abundant number, since it is smaller than the sum of its proper divisors (75589204).

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

68717420 is a wasteful number, since it uses less digits than its factorization.

68717420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3435880 (or 3435878 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 35.

The square root of 68717420 is about 8289.5970951549. The cubic root of 68717420 is about 409.5959135919.

The spelling of 68717420 in words is "sixty-eight million, seven hundred seventeen thousand, four hundred twenty".