426685857 has 16 divisors (see below), whose sum is σ = 639316608. Its totient is φ = 251159040.

The previous prime is 426685823. The next prime is 426685859. The reversal of 426685857 is 758586624.

It is a happy number.

It is not a de Polignac number, because 426685857 - 2¹⁴ = 426669473 is a prime.

It is not an unprimeable number, because it can be changed into a prime (426685859) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 236944 + ... + 238737.

It is an arithmetic number, because the mean of its divisors is an integer number (39957288).

Almost surely, 2^426685857 is an apocalyptic number.

It is an amenable number.

426685857 is a deficient number, since it is larger than the sum of its proper divisors (212630751).

426685857 is a wasteful number, since it uses less digits than its factorization.

426685857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475720.

The product of its digits is 3225600, while the sum is 51.

The square root of 426685857 is about 20656.3756985585. The cubic root of 426685857 is about 752.8401096825.

The spelling of 426685857 in words is "four hundred twenty-six million, six hundred eighty-five thousand, eight hundred fifty-seven".