68440957 has 16 divisors (see below), whose sum is σ = 76608000. Its totient is φ = 60709824.

The previous prime is 68440937. The next prime is 68441011. The reversal of 68440957 is 75904486.

It is a cyclic number.

It is not a de Polignac number, because 68440957 - 2¹⁹ = 67916669 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68440937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 142644 + ... + 143122.

It is an arithmetic number, because the mean of its divisors is an integer number (4788000).

Almost surely, 2^68440957 is an apocalyptic number.

It is an amenable number.

68440957 is a deficient number, since it is larger than the sum of its proper divisors (8167043).

68440957 is a wasteful number, since it uses less digits than its factorization.

68440957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 900.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 68440957 is about 8272.9049915976. The cubic root of 68440957 is about 409.0458817138.

The spelling of 68440957 in words is "sixty-eight million, four hundred forty thousand, nine hundred fifty-seven".