68687405 has 16 divisors (see below), whose sum is σ = 83462400. Its totient is φ = 54264000.

The previous prime is 68687393. The next prime is 68687467. The reversal of 68687405 is 50478686.

It is not a de Polignac number, because 68687405 - 2²² = 64493101 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 273530 + ... + 273780.

It is an arithmetic number, because the mean of its divisors is an integer number (5216400).

Almost surely, 2^68687405 is an apocalyptic number.

It is an amenable number.

68687405 is a deficient number, since it is larger than the sum of its proper divisors (14774995).

68687405 is a wasteful number, since it uses less digits than its factorization.

68687405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 724.

The product of its (nonzero) digits is 322560, while the sum is 44.

The square root of 68687405 is about 8287.7864958021. The cubic root of 68687405 is about 409.5362692701.

The spelling of 68687405 in words is "sixty-eight million, six hundred eighty-seven thousand, four hundred five".