861519852 has 36 divisors (see below), whose sum is σ = 2179673496. Its totient is φ = 286917120.

The previous prime is 861519833. The next prime is 861519859. The reversal of 861519852 is 258915168.

It is a happy number.

861519852 is a `hidden beast` number, since 86 + 1 + 519 + 8 + 52 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a junction number, because it is equal to n+sod(n) for n = 861519798 and 861519807.

It is not an unprimeable number, because it can be changed into a prime (861519859) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 32652 + ... + 52812.

It is an arithmetic number, because the mean of its divisors is an integer number (60546486).

Almost surely, 2^861519852 is an apocalyptic number.

It is an amenable number.

861519852 is an abundant number, since it is smaller than the sum of its proper divisors (1318153644).

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

861519852 is a wasteful number, since it uses less digits than its factorization.

861519852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21358 (or 21353 counting only the distinct ones).

The product of its digits is 172800, while the sum is 45.

The square root of 861519852 is about 29351.6584199258. The cubic root of 861519852 is about 951.5284176020.

The spelling of 861519852 in words is "eight hundred sixty-one million, five hundred nineteen thousand, eight hundred fifty-two".