858249045 has 24 divisors (see below), whose sum is σ = 1502082816. Its totient is φ = 453286368.

The previous prime is 858249037. The next prime is 858249047. The reversal of 858249045 is 540942858.

858249045 is a `hidden beast` number, since 85 + 82 + 490 + 4 + 5 = 666.

It is not a de Polignac number, because 858249045 - 2³ = 858249037 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (858249047) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 87949 + ... + 97218.

It is an arithmetic number, because the mean of its divisors is an integer number (62586784).

Almost surely, 2^858249045 is an apocalyptic number.

It is an amenable number.

858249045 is a deficient number, since it is larger than the sum of its proper divisors (643833771).

858249045 is a wasteful number, since it uses less digits than its factorization.

858249045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185281 (or 185278 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The square root of 858249045 is about 29295.8878513692. The cubic root of 858249045 is about 950.3227140000.

The spelling of 858249045 in words is "eight hundred fifty-eight million, two hundred forty-nine thousand, forty-five".