856030749 has 8 divisors (see below), whose sum is σ = 1304427840. Its totient is φ = 489160416.

The previous prime is 856030739. The next prime is 856030753. The reversal of 856030749 is 947030658.

It is a happy number.

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

It is not a de Polignac number, because 856030749 - 2¹⁶ = 855965213 is a prime.

It is a super-3 number, since 3×856030749³ (a number of 28 digits) contains 333 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 856030749.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (856030739) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20381664 + ... + 20381705.

It is an arithmetic number, because the mean of its divisors is an integer number (163053480).

Almost surely, 2^856030749 is an apocalyptic number.

It is an amenable number.

856030749 is a deficient number, since it is larger than the sum of its proper divisors (448397091).

856030749 is a wasteful number, since it uses less digits than its factorization.

856030749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40763379.

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 856030749 is about 29258.0031615283. The cubic root of 856030749 is about 949.5032486985.

Subtracting 856030749 from its reverse (947030658), we obtain a palindrome (90999909).

The spelling of 856030749 in words is "eight hundred fifty-six million, thirty thousand, seven hundred forty-nine".