72247170 has 16 divisors (see below), whose sum is σ = 173393280. Its totient is φ = 19265904.

The previous prime is 72247121. The next prime is 72247171. The reversal of 72247170 is 7174227.

It is a Harshad number since it is a multiple of its sum of digits (30), and also a Moran number because the ratio is a prime number: 2408239 = 72247170 / (7 + 2 + 2 + 4 + 7 + 1 + 7 + 0).

It is not an unprimeable number, because it can be changed into a prime (72247171) 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, 1204090 + ... + 1204149.

It is an arithmetic number, because the mean of its divisors is an integer number (10837080).

Almost surely, 2^72247170 is an apocalyptic number.

72247170 is an abundant number, since it is smaller than the sum of its proper divisors (101146110).

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

72247170 is a wasteful number, since it uses less digits than its factorization.

72247170 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2408249.

The product of its (nonzero) digits is 5488, while the sum is 30.

The square root of 72247170 is about 8499.8335277816. The cubic root of 72247170 is about 416.4922711949.

The spelling of 72247170 in words is "seventy-two million, two hundred forty-seven thousand, one hundred seventy".