865947552 has 192 divisors, whose sum is σ = 2471067648. Its totient is φ = 264960000.

The previous prime is 865947541. The next prime is 865947571. The reversal of 865947552 is 255749568.

It is a junction number, because it is equal to n+sod(n) for n = 865947495 and 865947504.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 5734677 + ... + 5734827.

It is an arithmetic number, because the mean of its divisors is an integer number (12870144).

Almost surely, 2^865947552 is an apocalyptic number.

865947552 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 865947552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1235533824).

865947552 is an abundant number, since it is smaller than the sum of its proper divisors (1605120096).

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

865947552 is a wasteful number, since it uses less digits than its factorization.

865947552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 283 (or 275 counting only the distinct ones).

The product of its digits is 3024000, while the sum is 51.

The square root of 865947552 is about 29426.9867978358. The cubic root of 865947552 is about 953.1557298156.

The spelling of 865947552 in words is "eight hundred sixty-five million, nine hundred forty-seven thousand, five hundred fifty-two".