68778882 has 40 divisors (see below), whose sum is σ = 155375616. Its totient is φ = 22738968.

The previous prime is 68778881. The next prime is 68778929. The reversal of 68778882 is 28887786.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (68778881) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18903 + ... + 22245.

Almost surely, 2^68778882 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68778882, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77687808).

68778882 is an abundant number, since it is smaller than the sum of its proper divisors (86596734).

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

68778882 is a wasteful number, since it uses less digits than its factorization.

68778882 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3484 (or 3475 counting only the distinct ones).

The product of its digits is 2408448, while the sum is 54.

The square root of 68778882 is about 8293.3034431401. The cubic root of 68778882 is about 409.7179936615.

The spelling of 68778882 in words is "sixty-eight million, seven hundred seventy-eight thousand, eight hundred eighty-two".