72018430 has 32 divisors (see below), whose sum is σ = 143749728. Its totient is φ = 25756800.

The previous prime is 72018413. The next prime is 72018433. The reversal of 72018430 is 3481027.

It is a junction number, because it is equal to n+sod(n) for n = 72018395 and 72018404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72018433) 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, 1344 + ... + 12076.

It is an arithmetic number, because the mean of its divisors is an integer number (4492179).

Almost surely, 2^72018430 is an apocalyptic number.

72018430 is a deficient number, since it is larger than the sum of its proper divisors (71731298).

72018430 is a wasteful number, since it uses less digits than its factorization.

72018430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10812.

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 72018430 is about 8486.3673029159. The cubic root of 72018430 is about 416.0522578274.

Adding to 72018430 its reverse (3481027), we get a palindrome (75499457).

The spelling of 72018430 in words is "seventy-two million, eighteen thousand, four hundred thirty".