858409057 has 8 divisors (see below), whose sum is σ = 936748800. Its totient is φ = 780119760.

The previous prime is 858409051. The next prime is 858409063. The reversal of 858409057 is 750904858.

It is an interprime number because it is at equal distance from previous prime (858409051) and next prime (858409063).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 858409057 - 2³ = 858409049 is a prime.

It is a super-2 number, since 2×858409057² = 1473732218279258498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 858408998 and 858409016.

It is not an unprimeable number, because it can be changed into a prime (858409051) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28944 + ... + 50542.

It is an arithmetic number, because the mean of its divisors is an integer number (117093600).

Almost surely, 2^858409057 is an apocalyptic number.

It is an amenable number.

858409057 is a deficient number, since it is larger than the sum of its proper divisors (78339743).

858409057 is a wasteful number, since it uses less digits than its factorization.

858409057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25223.

The product of its (nonzero) digits is 403200, while the sum is 46.

The square root of 858409057 is about 29298.6186875764. The cubic root of 858409057 is about 950.3817697367.

The spelling of 858409057 in words is "eight hundred fifty-eight million, four hundred nine thousand, fifty-seven".