849149520 has 160 divisors (see below), whose sum is σ = 2860769280. Its totient is φ = 207567360.

The previous prime is 849149513. The next prime is 849149527. The reversal of 849149520 is 25941948.

It is an interprime number because it is at equal distance from previous prime (849149513) and next prime (849149527).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849149527) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 138357 + ... + 144363.

It is an arithmetic number, because the mean of its divisors is an integer number (17879808).

Almost surely, 2^849149520 is an apocalyptic number.

849149520 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 849149520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1430384640).

849149520 is an abundant number, since it is smaller than the sum of its proper divisors (2011619760).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

849149520 is a wasteful number, since it uses less digits than its factorization.

849149520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6073 (or 6067 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 42.

The square root of 849149520 is about 29140.1702122688. The cubic root of 849149520 is about 946.9521973680.

The spelling of 849149520 in words is "eight hundred forty-nine million, one hundred forty-nine thousand, five hundred twenty".