68942736 has 30 divisors (see below), whose sum is σ = 192944310. Its totient is φ = 22980864.

The previous prime is 68942723. The next prime is 68942737. The reversal of 68942736 is 63724986.

It can be written as a sum of positive squares in only one way, i.e., 58982400 + 9960336 = 7680^2 + 3156^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68942691 and 68942700.

It is not an unprimeable number, because it can be changed into a prime (68942737) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 239241 + ... + 239528.

It is an arithmetic number, because the mean of its divisors is an integer number (6431477).

Almost surely, 2^68942736 is an apocalyptic number.

It is an amenable number.

68942736 is an abundant number, since it is smaller than the sum of its proper divisors (124001574).

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

68942736 is a wasteful number, since it uses less digits than its factorization.

68942736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 478783 (or 478774 counting only the distinct ones).

The product of its digits is 435456, while the sum is 45.

The square root of 68942736 is about 8303.1762597213. The cubic root of 68942736 is about 410.0430967983.

The spelling of 68942736 in words is "sixty-eight million, nine hundred forty-two thousand, seven hundred thirty-six".