207172140 has 96 divisors (see below), whose sum is σ = 669527040. Its totient is φ = 46884096.

The previous prime is 207172127. The next prime is 207172211. The reversal of 207172140 is 41271702.

It is a self number, because there is not a number n which added to its sum of digits gives 207172140.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40866 + ... + 45654.

It is an arithmetic number, because the mean of its divisors is an integer number (6974240).

Almost surely, 2^207172140 is an apocalyptic number.

207172140 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 207172140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334763520).

207172140 is an abundant number, since it is smaller than the sum of its proper divisors (462354900).

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

207172140 is a wasteful number, since it uses less digits than its factorization.

207172140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4911 (or 4909 counting only the distinct ones).

The product of its (nonzero) digits is 784, while the sum is 24.

The square root of 207172140 is about 14393.4756052873. The cubic root of 207172140 is about 591.7121005469.

The spelling of 207172140 in words is "two hundred seven million, one hundred seventy-two thousand, one hundred forty".