68222784 has 112 divisors (see below), whose sum is σ = 215359488. Its totient is φ = 18636288.

The previous prime is 68222767. The next prime is 68222801. The reversal of 68222784 is 48722286.

It is an interprime number because it is at equal distance from previous prime (68222767) and next prime (68222801).

It is a tau number, because it is divible by the number of its divisors (112).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

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 15 ways as a sum of consecutive naturals, for example, 29809 + ... + 32015.

Almost surely, 2^68222784 is an apocalyptic number.

68222784 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 68222784, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107679744).

68222784 is an abundant number, since it is smaller than the sum of its proper divisors (147136704).

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

68222784 is a wasteful number, since it uses less digits than its factorization.

68222784 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2252 (or 2242 counting only the distinct ones).

The product of its digits is 86016, while the sum is 39.

The square root of 68222784 is about 8259.7084694316. The cubic root of 68222784 is about 408.6107730333.

It can be divided in two parts, 68222 and 784, that added together give a triangular number (69006 = T₃₇₁).

The spelling of 68222784 in words is "sixty-eight million, two hundred twenty-two thousand, seven hundred eighty-four".