457085781 has 16 divisors (see below), whose sum is σ = 678424000. Its totient is φ = 304156944.

The previous prime is 457085779. The next prime is 457085789. The reversal of 457085781 is 187580754.

It is a happy number.

457085781 is a `hidden beast` number, since 4 + 5 + 70 + 8 + 578 + 1 = 666.

It is not a de Polignac number, because 457085781 - 2¹ = 457085779 is a prime.

It is a super-2 number, since 2×457085781² = 417854822384759922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (457085789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 706 + ... + 30243.

It is an arithmetic number, because the mean of its divisors is an integer number (42401500).

Almost surely, 2^457085781 is an apocalyptic number.

It is an amenable number.

457085781 is a deficient number, since it is larger than the sum of its proper divisors (221338219).

457085781 is a wasteful number, since it uses less digits than its factorization.

457085781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31505 (or 31499 counting only the distinct ones).

The product of its (nonzero) digits is 313600, while the sum is 45.

The square root of 457085781 is about 21379.5645652572. The cubic root of 457085781 is about 770.3106527482.

The spelling of 457085781 in words is "four hundred fifty-seven million, eighty-five thousand, seven hundred eighty-one".