406041857 has 4 divisors (see below), whose sum is σ = 437275860. Its totient is φ = 374807856.

The previous prime is 406041817. The next prime is 406041887. The reversal of 406041857 is 758140604.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 52940176 + 353101681 = 7276^2 + 18791^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-406041857 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (406041817) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15616982 + ... + 15617007.

It is an arithmetic number, because the mean of its divisors is an integer number (109318965).

Almost surely, 2^406041857 is an apocalyptic number.

It is an amenable number.

406041857 is a deficient number, since it is larger than the sum of its proper divisors (31234003).

406041857 is a wasteful number, since it uses less digits than its factorization.

406041857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31234002.

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 406041857 is about 20150.4803168560. The cubic root of 406041857 is about 740.4975087616.

The spelling of 406041857 in words is "four hundred six million, forty-one thousand, eight hundred fifty-seven".