68624224 has 12 divisors (see below), whose sum is σ = 135104004. Its totient is φ = 34312096.

The previous prime is 68624221. The next prime is 68624243. The reversal of 68624224 is 42242686.

It is a self number, because there is not a number n which added to its sum of digits gives 68624224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68624221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1072222 + ... + 1072285.

It is an arithmetic number, because the mean of its divisors is an integer number (11258667).

Almost surely, 2^68624224 is an apocalyptic number.

It is an amenable number.

68624224 is a deficient number, since it is larger than the sum of its proper divisors (66479780).

68624224 is a wasteful number, since it uses less digits than its factorization.

68624224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2144517 (or 2144509 counting only the distinct ones).

The product of its digits is 36864, while the sum is 34.

The square root of 68624224 is about 8283.9739255988. The cubic root of 68624224 is about 409.4106623090.

The spelling of 68624224 in words is "sixty-eight million, six hundred twenty-four thousand, two hundred twenty-four".