72470431 has 8 divisors (see below), whose sum is σ = 79409664. Its totient is φ = 65589720.

The previous prime is 72470369. The next prime is 72470441. The reversal of 72470431 is 13407427.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72470431 - 2¹³ = 72462239 is a prime.

It is a super-2 number, since 2×72470431² = 10503926738651522, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 72470431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72470441) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12015 + ... + 17008.

It is an arithmetic number, because the mean of its divisors is an integer number (9926208).

Almost surely, 2^72470431 is an apocalyptic number.

72470431 is a deficient number, since it is larger than the sum of its proper divisors (6939233).

72470431 is a wasteful number, since it uses less digits than its factorization.

72470431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29261.

The product of its (nonzero) digits is 4704, while the sum is 28.

The square root of 72470431 is about 8512.9566544180. The cubic root of 72470431 is about 416.9208502040.

Adding to 72470431 its reverse (13407427), we get a palindrome (85877858).

The spelling of 72470431 in words is "seventy-two million, four hundred seventy thousand, four hundred thirty-one".