849947580 has 120 divisors (see below), whose sum is σ = 2690492112. Its totient is φ = 224598528.

The previous prime is 849947563. The next prime is 849947599. The reversal of 849947580 is 85749948.

849947580 is a `hidden beast` number, since 8 + 4 + 99 + 475 + 80 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 180739 + ... + 185381.

Almost surely, 2^849947580 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 849947580, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1345246056).

849947580 is an abundant number, since it is smaller than the sum of its proper divisors (1840544532).

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

849947580 is a wasteful number, since it uses less digits than its factorization.

849947580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4777 (or 4766 counting only the distinct ones).

The product of its (nonzero) digits is 2903040, while the sum is 54.

The square root of 849947580 is about 29153.8604647824. The cubic root of 849947580 is about 947.2487639225.

The spelling of 849947580 in words is "eight hundred forty-nine million, nine hundred forty-seven thousand, five hundred eighty".