68621860 has 24 divisors (see below), whose sum is σ = 152583480. Its totient is φ = 25833984.

The previous prime is 68621831. The next prime is 68621887. The reversal of 68621860 is 6812686.

It can be written as a sum of positive squares in 4 ways, for example, as 7750656 + 60871204 = 2784^2 + 7802^2 .

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 an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 100575 + ... + 101254.

It is an arithmetic number, because the mean of its divisors is an integer number (6357645).

Almost surely, 2^68621860 is an apocalyptic number.

It is an amenable number.

68621860 is an abundant number, since it is smaller than the sum of its proper divisors (83961620).

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

68621860 is a wasteful number, since it uses less digits than its factorization.

68621860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201855 (or 201853 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 68621860 is about 8283.8312392274. The cubic root of 68621860 is about 409.4059610637.

The spelling of 68621860 in words is "sixty-eight million, six hundred twenty-one thousand, eight hundred sixty".