864533652 has 12 divisors (see below), whose sum is σ = 2017245216. Its totient is φ = 288177880.

The previous prime is 864533617. The next prime is 864533653. The reversal of 864533652 is 256335468.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (864533653) 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, 36022224 + ... + 36022247.

It is an arithmetic number, because the mean of its divisors is an integer number (168103768).

Almost surely, 2^864533652 is an apocalyptic number.

It is an amenable number.

864533652 is an abundant number, since it is smaller than the sum of its proper divisors (1152711564).

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

864533652 is a wasteful number, since it uses less digits than its factorization.

864533652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72044478 (or 72044476 counting only the distinct ones).

The product of its digits is 518400, while the sum is 42.

The square root of 864533652 is about 29402.9531169915. The cubic root of 864533652 is about 952.6366833562.

The spelling of 864533652 in words is "eight hundred sixty-four million, five hundred thirty-three thousand, six hundred fifty-two".