858225649 has 4 divisors (see below), whose sum is σ = 903395440. Its totient is φ = 813055860.

The previous prime is 858225647. The next prime is 858225659. The reversal of 858225649 is 946522858.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 858225649 - 2¹ = 858225647 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (858225647) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22584867 + ... + 22584904.

It is an arithmetic number, because the mean of its divisors is an integer number (225848860).

Almost surely, 2^858225649 is an apocalyptic number.

It is an amenable number.

858225649 is a deficient number, since it is larger than the sum of its proper divisors (45169791).

858225649 is a wasteful number, since it uses less digits than its factorization.

858225649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45169790.

The product of its digits is 1382400, while the sum is 49.

The square root of 858225649 is about 29295.4885434601. The cubic root of 858225649 is about 950.3140786075.

The spelling of 858225649 in words is "eight hundred fifty-eight million, two hundred twenty-five thousand, six hundred forty-nine".