858740457 has 16 divisors (see below), whose sum is σ = 1165639680. Its totient is φ = 562188432.

The previous prime is 858740447. The next prime is 858740461. The reversal of 858740457 is 754047858.

It is a de Polignac number, because none of the positive numbers 2^k-858740457 is a prime.

It is not an unprimeable number, because it can be changed into a prime (858740447) 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, 214488 + ... + 218454.

It is an arithmetic number, because the mean of its divisors is an integer number (72852480).

Almost surely, 2^858740457 is an apocalyptic number.

It is an amenable number.

858740457 is a deficient number, since it is larger than the sum of its proper divisors (306899223).

858740457 is a wasteful number, since it uses less digits than its factorization.

858740457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5252.

The product of its (nonzero) digits is 1254400, while the sum is 48.

The square root of 858740457 is about 29304.2736985580. The cubic root of 858740457 is about 950.5040564226.

The spelling of 858740457 in words is "eight hundred fifty-eight million, seven hundred forty thousand, four hundred fifty-seven".