68637424 has 20 divisors (see below), whose sum is σ = 139984840. Its totient is φ = 32512320.

The previous prime is 68637421. The next prime is 68637427. The reversal of 68637424 is 42473686.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (68637421) and next prime (68637427).

It is a super-2 number, since 2×68637424² = 9422191946711552, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68637421) by changing a digit.

It is an upside-down number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112587 + ... + 113194.

It is an arithmetic number, because the mean of its divisors is an integer number (6999242).

Almost surely, 2^68637424 is an apocalyptic number.

It is an amenable number.

68637424 is an abundant number, since it is smaller than the sum of its proper divisors (71347416).

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

68637424 is a wasteful number, since it uses less digits than its factorization.

68637424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 225808 (or 225802 counting only the distinct ones).

The product of its digits is 193536, while the sum is 40.

The square root of 68637424 is about 8284.7706063596. The cubic root of 68637424 is about 409.4369109326.

The spelling of 68637424 in words is "sixty-eight million, six hundred thirty-seven thousand, four hundred twenty-four".