72390471 has 16 divisors (see below), whose sum is σ = 102643200. Its totient is φ = 45223808.

The previous prime is 72390443. The next prime is 72390511. The reversal of 72390471 is 17409327.

It is not a de Polignac number, because 72390471 - 2⁷ = 72390343 is a prime.

It is a super-3 number, since 3×72390471³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72390431) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9220 + ... + 15158.

It is an arithmetic number, because the mean of its divisors is an integer number (6415200).

Almost surely, 2^72390471 is an apocalyptic number.

72390471 is a deficient number, since it is larger than the sum of its proper divisors (30252729).

72390471 is a wasteful number, since it uses less digits than its factorization.

72390471 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6198.

The product of its (nonzero) digits is 10584, while the sum is 33.

The square root of 72390471 is about 8508.2589875955. The cubic root of 72390471 is about 416.7674577146.

Adding to 72390471 its reverse (17409327), we get a palindrome (89799798).

The spelling of 72390471 in words is "seventy-two million, three hundred ninety thousand, four hundred seventy-one".