68438457 has 24 divisors (see below), whose sum is σ = 100420320. Its totient is φ = 44910720.

The previous prime is 68438443. The next prime is 68438459. The reversal of 68438457 is 75483486.

It is not a de Polignac number, because 68438457 - 2²⁴ = 51661241 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (68438459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 283857 + ... + 284097.

It is an arithmetic number, because the mean of its divisors is an integer number (4184180).

Almost surely, 2^68438457 is an apocalyptic number.

It is an amenable number.

68438457 is a deficient number, since it is larger than the sum of its proper divisors (31981863).

68438457 is a wasteful number, since it uses less digits than its factorization.

68438457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613 (or 610 counting only the distinct ones).

The product of its digits is 645120, while the sum is 45.

The square root of 68438457 is about 8272.7538945626. The cubic root of 68438457 is about 409.0409011330.

The spelling of 68438457 in words is "sixty-eight million, four hundred thirty-eight thousand, four hundred fifty-seven".