852217840 has 20 divisors (see below), whose sum is σ = 1981406664. Its totient is φ = 340887104.

The previous prime is 852217831. The next prime is 852217843. The reversal of 852217840 is 48712258.

It is a tau number, because it is divible by the number of its divisors (20).

It is a self number, because there is not a number n which added to its sum of digits gives 852217840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (852217843) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5326282 + ... + 5326441.

Almost surely, 2^852217840 is an apocalyptic number.

852217840 is a gapful number since it is divisible by the number (80) formed by its first and last digit.

It is an amenable number.

852217840 is an abundant number, since it is smaller than the sum of its proper divisors (1129188824).

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

852217840 is a wasteful number, since it uses less digits than its factorization.

852217840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10652736 (or 10652730 counting only the distinct ones).

The product of its (nonzero) digits is 35840, while the sum is 37.

The square root of 852217840 is about 29192.7703378765. The cubic root of 852217840 is about 948.0913998531.

It can be divided in two parts, 8522 and 17840, that added together give a palindrome (26362).

The spelling of 852217840 in words is "eight hundred fifty-two million, two hundred seventeen thousand, eight hundred forty".