68636090 has 16 divisors (see below), whose sum is σ = 123680520. Its totient is φ = 27424320.

The previous prime is 68636083. The next prime is 68636107. The reversal of 68636090 is 9063686.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 42758521 + 25877569 = 6539^2 + 5087^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7376 + ... + 13844.

Almost surely, 2^68636090 is an apocalyptic number.

68636090 is a deficient number, since it is larger than the sum of its proper divisors (55044430).

68636090 is a wasteful number, since it uses less digits than its factorization.

68636090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7537.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 68636090 is about 8284.6900967990. The cubic root of 68636090 is about 409.4342583836.

The spelling of 68636090 in words is "sixty-eight million, six hundred thirty-six thousand, ninety".