72189302 has 4 divisors (see below), whose sum is σ = 108283956. Its totient is φ = 36094650.

The previous prime is 72189287. The next prime is 72189307. The reversal of 72189302 is 20398127.

It is a semiprime because it is the product of two primes.

It is a super-2 number, since 2×72189302² = 10422590646494408, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72189307) 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 as a sum of consecutive naturals, namely, 18047324 + ... + 18047327.

It is an arithmetic number, because the mean of its divisors is an integer number (27070989).

Almost surely, 2^72189302 is an apocalyptic number.

72189302 is a deficient number, since it is larger than the sum of its proper divisors (36094654).

72189302 is a wasteful number, since it uses less digits than its factorization.

72189302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36094653.

The product of its (nonzero) digits is 6048, while the sum is 32.

The square root of 72189302 is about 8496.4287791989. The cubic root of 72189302 is about 416.3810418669.

The spelling of 72189302 in words is "seventy-two million, one hundred eighty-nine thousand, three hundred two".