68638339 has 32 divisors (see below), whose sum is σ = 88542720. Its totient is φ = 52097760.

The previous prime is 68638337. The next prime is 68638357. The reversal of 68638339 is 93383686.

68638339 = T₂ + T₃ + ... + T₇₄₃.

It is not a de Polignac number, because 68638339 - 2¹ = 68638337 is a prime.

It is a super-2 number, since 2×68638339² = 9422443161357842, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68638337) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 493732 + ... + 493870.

It is an arithmetic number, because the mean of its divisors is an integer number (2766960).

Almost surely, 2^68638339 is an apocalyptic number.

68638339 is a deficient number, since it is larger than the sum of its proper divisors (19904381).

68638339 is a wasteful number, since it uses less digits than its factorization.

68638339 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 232 (or 210 counting only the distinct ones).

The product of its digits is 559872, while the sum is 46.

The square root of 68638339 is about 8284.8258279821. The cubic root of 68638339 is about 409.4387303147.

The spelling of 68638339 in words is "sixty-eight million, six hundred thirty-eight thousand, three hundred thirty-nine".