72282644 has 18 divisors (see below), whose sum is σ = 147147210. Its totient is φ = 30978192.

The previous prime is 72282547. The next prime is 72282647. The reversal of 72282644 is 44628227.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 66618244 + 5664400 = 8162^2 + 2380^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72282647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 184199 + ... + 184590.

It is an arithmetic number, because the mean of its divisors is an integer number (8174845).

Almost surely, 2^72282644 is an apocalyptic number.

It is an amenable number.

72282644 is an abundant number, since it is smaller than the sum of its proper divisors (74864566).

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

72282644 is a wasteful number, since it uses less digits than its factorization.

72282644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 368807 (or 368798 counting only the distinct ones).

The product of its digits is 43008, while the sum is 35.

The square root of 72282644 is about 8501.9200184429. The cubic root of 72282644 is about 416.5604271717.

The spelling of 72282644 in words is "seventy-two million, two hundred eighty-two thousand, six hundred forty-four".