864881552 has 40 divisors (see below), whose sum is σ = 1720457592. Its totient is φ = 420940800.

The previous prime is 864881551. The next prime is 864881597. The reversal of 864881552 is 255188468.

It can be written as a sum of positive squares in 4 ways, for example, as 90706576 + 774174976 = 9524^2 + 27824^2 .

It is a junction number, because it is equal to n+sod(n) for n = 864881497 and 864881506.

It is not an unprimeable number, because it can be changed into a prime (864881551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 353678 + ... + 356114.

Almost surely, 2^864881552 is an apocalyptic number.

864881552 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

864881552 is a deficient number, since it is larger than the sum of its proper divisors (855576040).

864881552 is a wasteful number, since it uses less digits than its factorization.

864881552 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3027 (or 3021 counting only the distinct ones).

The product of its digits is 614400, while the sum is 47.

The square root of 864881552 is about 29408.8685943543. The cubic root of 864881552 is about 952.7644508353.

The spelling of 864881552 in words is "eight hundred sixty-four million, eight hundred eighty-one thousand, five hundred fifty-two".