68700040 has 16 divisors (see below), whose sum is σ = 154575180. Its totient is φ = 27480000.

The previous prime is 68700019. The next prime is 68700089. The reversal of 68700040 is 4000786.

It can be written as a sum of positive squares in 2 ways, for example, as 67864644 + 835396 = 8238^2 + 914^2 .

It is a junction number, because it is equal to n+sod(n) for n = 68699978 and 68700014.

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, 858711 + ... + 858790.

Almost surely, 2^68700040 is an apocalyptic number.

It is an amenable number.

68700040 is an abundant number, since it is smaller than the sum of its proper divisors (85875140).

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

68700040 is a wasteful number, since it uses less digits than its factorization.

68700040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1717512 (or 1717508 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 68700040 is about 8288.5487270088. The cubic root of 68700040 is about 409.5613790337.

The spelling of 68700040 in words is "sixty-eight million, seven hundred thousand, forty".