68688405 has 40 divisors (see below), whose sum is σ = 127125504. Its totient is φ = 35445600.

The previous prime is 68688377. The next prime is 68688437. The reversal of 68688405 is 50488686.

It is not a de Polignac number, because 68688405 - 2⁶ = 68688341 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 9820 + ... + 15290.

Almost surely, 2^68688405 is an apocalyptic number.

It is an amenable number.

68688405 is a deficient number, since it is larger than the sum of its proper divisors (58437099).

68688405 is a wasteful number, since it uses less digits than its factorization.

68688405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5519 (or 5510 counting only the distinct ones).

The product of its (nonzero) digits is 368640, while the sum is 45.

The square root of 68688405 is about 8287.8468253220. The cubic root of 68688405 is about 409.5382567004.

The spelling of 68688405 in words is "sixty-eight million, six hundred eighty-eight thousand, four hundred five".