68517620 has 24 divisors (see below), whose sum is σ = 144698400. Its totient is φ = 27252512.

The previous prime is 68517613. The next prime is 68517623. The reversal of 68517620 is 2671586.

68517620 = T₄₃₁ + T₄₃₂ + ... + T₇₈₈.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68517623) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5990 + ... + 13149.

It is an arithmetic number, because the mean of its divisors is an integer number (6029100).

Almost surely, 2^68517620 is an apocalyptic number.

It is an amenable number.

68517620 is an abundant number, since it is smaller than the sum of its proper divisors (76180780).

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

68517620 is a wasteful number, since it uses less digits than its factorization.

68517620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19327 (or 19325 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 68517620 is about 8277.5370733087. The cubic root of 68517620 is about 409.1985533715.

The spelling of 68517620 in words is "sixty-eight million, five hundred seventeen thousand, six hundred twenty".