68881040 has 20 divisors (see below), whose sum is σ = 160148604. Its totient is φ = 27552384.

The previous prime is 68881037. The next prime is 68881049. The reversal of 68881040 is 4018886.

It can be written as a sum of positive squares in 2 ways, for example, as 21381376 + 47499664 = 4624^2 + 6892^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is not an unprimeable number, because it can be changed into a prime (68881049) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 430427 + ... + 430586.

Almost surely, 2^68881040 is an apocalyptic number.

It is an amenable number.

68881040 is an abundant number, since it is smaller than the sum of its proper divisors (91267564).

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

68881040 is a wasteful number, since it uses less digits than its factorization.

68881040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 861026 (or 861020 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 35.

The square root of 68881040 is about 8299.4602234121. The cubic root of 68881040 is about 409.9207461326.

The spelling of 68881040 in words is "sixty-eight million, eight hundred eighty-one thousand, forty".