72430170 has 64 divisors (see below), whose sum is σ = 178606080. Its totient is φ = 18792000.

The previous prime is 72430157. The next prime is 72430207. The reversal of 72430170 is 7103427.

It is a super-2 number, since 2×72430170² = 10492259052457800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 72430170.

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 31 ways as a sum of consecutive naturals, for example, 267135 + ... + 267405.

It is an arithmetic number, because the mean of its divisors is an integer number (2790720).

Almost surely, 2^72430170 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 72430170, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (89303040).

72430170 is an abundant number, since it is smaller than the sum of its proper divisors (106175910).

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

72430170 is a wasteful number, since it uses less digits than its factorization.

72430170 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491.

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

The square root of 72430170 is about 8510.5916363083. The cubic root of 72430170 is about 416.8436290095.

Adding to 72430170 its reverse (7103427), we get a palindrome (79533597).

The spelling of 72430170 in words is "seventy-two million, four hundred thirty thousand, one hundred seventy".