68012224 has 28 divisors (see below), whose sum is σ = 154243024. Its totient is φ = 29147904.

The previous prime is 68012213. The next prime is 68012237. The reversal of 68012224 is 42221086.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (28).

It is a super-2 number, since 2×68012224² = 9251325226852352, which contains 22 as substring.

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, 75459 + ... + 76354.

Almost surely, 2^68012224 is an apocalyptic number.

68012224 is a gapful number since it is divisible by the number (64) formed by its first and last digit.

It is an amenable number.

68012224 is an abundant number, since it is smaller than the sum of its proper divisors (86230800).

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

68012224 is a wasteful number, since it uses less digits than its factorization.

68012224 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 151832 (or 151822 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 25.

The square root of 68012224 is about 8246.9524067985. The cubic root of 68012224 is about 408.1899666440.

It can be divided in two parts, 6801 and 2224, that added together give a square (9025 = 95²).

The spelling of 68012224 in words is "sixty-eight million, twelve thousand, two hundred twenty-four".