68440836 has 24 divisors (see below), whose sum is σ = 163094400. Its totient is φ = 22328032.

The previous prime is 68440807. The next prime is 68440843. The reversal of 68440836 is 63804486.

It is a junction number, because it is equal to n+sod(n) for n = 68440794 and 68440803.

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, 60111 + ... + 61238.

It is an arithmetic number, because the mean of its divisors is an integer number (6795600).

Almost surely, 2^68440836 is an apocalyptic number.

It is an amenable number.

68440836 is an abundant number, since it is smaller than the sum of its proper divisors (94653564).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

68440836 is a wasteful number, since it uses less digits than its factorization.

68440836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 121403 (or 121401 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 39.

The square root of 68440836 is about 8272.8976785646. The cubic root of 68440836 is about 409.0456406565.

The spelling of 68440836 in words is "sixty-eight million, four hundred forty thousand, eight hundred thirty-six".