72172302 has 16 divisors (see below), whose sum is σ = 145144272. Its totient is φ = 23924160.

The previous prime is 72172297. The next prime is 72172319. The reversal of 72172302 is 20327127.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32143 + ... + 34314.

It is an arithmetic number, because the mean of its divisors is an integer number (9071517).

Almost surely, 2^72172302 is an apocalyptic number.

72172302 is an abundant number, since it is smaller than the sum of its proper divisors (72971970).

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

72172302 is a wasteful number, since it uses less digits than its factorization.

72172302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66643.

The product of its (nonzero) digits is 1176, while the sum is 24.

The square root of 72172302 is about 8495.4282999741. The cubic root of 72172302 is about 416.3483545054.

Adding to 72172302 its reverse (20327127), we get a palindrome (92499429).

The spelling of 72172302 in words is "seventy-two million, one hundred seventy-two thousand, three hundred two".