68637426 has 32 divisors (see below), whose sum is σ = 161275968. Its totient is φ = 19199040.

The previous prime is 68637421. The next prime is 68637427. The reversal of 68637426 is 62473686.

It is a super-2 number, since 2×68637426² = 9422192495810952, which contains 22 as substring.

It is a Curzon number.

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

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 39141 + ... + 40856.

It is an arithmetic number, because the mean of its divisors is an integer number (5039874).

Almost surely, 2^68637426 is an apocalyptic number.

68637426 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

68637426 is an abundant number, since it is smaller than the sum of its proper divisors (92638542).

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

68637426 is a wasteful number, since it uses less digits than its factorization.

68637426 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80026.

The product of its digits is 290304, while the sum is 42.

The square root of 68637426 is about 8284.7707270630. The cubic root of 68637426 is about 409.4369149094.

The spelling of 68637426 in words is "sixty-eight million, six hundred thirty-seven thousand, four hundred twenty-six".