861284352 has 96 divisors (see below), whose sum is σ = 2320194240. Its totient is φ = 284098560.

The previous prime is 861284329. The next prime is 861284363. The reversal of 861284352 is 253482168.

It is a tau number, because it is divible by the number of its divisors (96).

It is a self number, because there is not a number n which added to its sum of digits gives 861284352.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 632152 + ... + 633512.

It is an arithmetic number, because the mean of its divisors is an integer number (24168690).

Almost surely, 2^861284352 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 861284352, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1160097120).

861284352 is an abundant number, since it is smaller than the sum of its proper divisors (1458909888).

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

861284352 is a wasteful number, since it uses less digits than its factorization.

861284352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1489 (or 1469 counting only the distinct ones).

The product of its digits is 92160, while the sum is 39.

The square root of 861284352 is about 29347.6464473729. The cubic root of 861284352 is about 951.4417082967.

The spelling of 861284352 in words is "eight hundred sixty-one million, two hundred eighty-four thousand, three hundred fifty-two".