72320652 has 36 divisors (see below), whose sum is σ = 193565736. Its totient is φ = 22688640.

The previous prime is 72320641. The next prime is 72320659. The reversal of 72320652 is 25602327.

72320652 is a `hidden beast` number, since 7 + 2 + 3 + 2 + 0 + 652 = 666.

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

It is not an unprimeable number, because it can be changed into a prime (72320659) 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, 58474 + ... + 59697.

It is an arithmetic number, because the mean of its divisors is an integer number (5376826).

Almost surely, 2^72320652 is an apocalyptic number.

It is an amenable number.

72320652 is an abundant number, since it is smaller than the sum of its proper divisors (121245084).

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

72320652 is a wasteful number, since it uses less digits than its factorization.

72320652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118198 (or 118193 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 27.

The square root of 72320652 is about 8504.1549844767. The cubic root of 72320652 is about 416.6334269661.

Adding to 72320652 its reverse (25602327), we get a palindrome (97922979).

The spelling of 72320652 in words is "seventy-two million, three hundred twenty thousand, six hundred fifty-two".