68687402 has 8 divisors (see below), whose sum is σ = 117749856. Its totient is φ = 29437452.

The previous prime is 68687393. The next prime is 68687467. The reversal of 68687402 is 20478686.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 68687402.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2453108 + ... + 2453135.

It is an arithmetic number, because the mean of its divisors is an integer number (14718732).

Almost surely, 2^68687402 is an apocalyptic number.

68687402 is a deficient number, since it is larger than the sum of its proper divisors (49062454).

68687402 is a wasteful number, since it uses less digits than its factorization.

68687402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4906252.

The product of its (nonzero) digits is 129024, while the sum is 41.

The square root of 68687402 is about 8287.7863148129. The cubic root of 68687402 is about 409.5362633078.

It can be divided in two parts, 686 and 87402, that added together give a palindrome (88088).

The spelling of 68687402 in words is "sixty-eight million, six hundred eighty-seven thousand, four hundred two".