68808784 has 20 divisors (see below), whose sum is σ = 145437120. Its totient is φ = 31276640.

The previous prime is 68808769. The next prime is 68808917. The reversal of 68808784 is 48780886.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 195304 + ... + 195655.

It is an arithmetic number, because the mean of its divisors is an integer number (7271856).

Almost surely, 2^68808784 is an apocalyptic number.

It is an amenable number.

68808784 is an abundant number, since it is smaller than the sum of its proper divisors (76628336).

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

68808784 is a wasteful number, since it uses less digits than its factorization.

68808784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 390978 (or 390972 counting only the distinct ones).

The product of its (nonzero) digits is 688128, while the sum is 49.

The square root of 68808784 is about 8295.1060270499. The cubic root of 68808784 is about 409.7773607815. Note that the first 3 decimals are identical.

The spelling of 68808784 in words is "sixty-eight million, eight hundred eight thousand, seven hundred eighty-four".