849630656 has 56 divisors (see below), whose sum is σ = 1967886336. Its totient is φ = 356371200.

The previous prime is 849630653. The next prime is 849630673. The reversal of 849630656 is 656036948.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×849630656² = 1443744503229980672, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (47).

It is a self number, because there is not a number n which added to its sum of digits gives 849630656.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (849630653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 881 + ... + 41231.

Almost surely, 2^849630656 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 849630656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (983943168).

849630656 is an abundant number, since it is smaller than the sum of its proper divisors (1118255680).

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

849630656 is a wasteful number, since it uses less digits than its factorization.

849630656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40417 (or 40407 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 47.

The square root of 849630656 is about 29148.4245886463. The cubic root of 849630656 is about 947.1310142341.

The spelling of 849630656 in words is "eight hundred forty-nine million, six hundred thirty thousand, six hundred fifty-six".