7172730 has 24 divisors (see below), whose sum is σ = 18649332. Its totient is φ = 1912704.

The previous prime is 7172729. The next prime is 7172731. The reversal of 7172730 is 372717.

It is an interprime number because it is at equal distance from previous prime (7172729) and next prime (7172731).

It can be written as a sum of positive squares in 2 ways, for example, as 7080921 + 91809 = 2661^2 + 303^2 .

It is a junction number, because it is equal to n+sod(n) for n = 7172694 and 7172703.

It is not an unprimeable number, because it can be changed into a prime (7172731) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 39759 + ... + 39938.

Almost surely, 2^7172730 is an apocalyptic number.

7172730 is an abundant number, since it is smaller than the sum of its proper divisors (11476602).

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

7172730 is a wasteful number, since it uses less digits than its factorization.

7172730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79710 (or 79707 counting only the distinct ones).

The product of its (nonzero) digits is 2058, while the sum is 27.

The square root of 7172730 is about 2678.1952878758. The cubic root of 7172730 is about 192.8537824223.

The spelling of 7172730 in words is "seven million, one hundred seventy-two thousand, seven hundred thirty".