68642404 has 12 divisors (see below), whose sum is σ = 120182524. Its totient is φ = 34304544.

The previous prime is 68642381. The next prime is 68642443. The reversal of 68642404 is 40424686.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 18939904 + 49702500 = 4352^2 + 7050^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 68642404.

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, 12634 + ... + 17230.

Almost surely, 2^68642404 is an apocalyptic number.

It is an amenable number.

68642404 is a deficient number, since it is larger than the sum of its proper divisors (51540120).

68642404 is a wasteful number, since it uses less digits than its factorization.

68642404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8334 (or 8332 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 34.

The square root of 68642404 is about 8285.0711523800. The cubic root of 68642404 is about 409.4468129481.

The spelling of 68642404 in words is "sixty-eight million, six hundred forty-two thousand, four hundred four".