172198740 has 144 divisors (see below), whose sum is σ = 576398592. Its totient is φ = 38271744.

The previous prime is 172198717. The next prime is 172198753. The reversal of 172198740 is 47891271.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 107989 + ... + 109571.

It is an arithmetic number, because the mean of its divisors is an integer number (4002768).

Almost surely, 2^172198740 is an apocalyptic number.

172198740 is a gapful number since it is divisible by the number (10) 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 172198740, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (288199296).

172198740 is an abundant number, since it is smaller than the sum of its proper divisors (404199852).

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

172198740 is a wasteful number, since it uses less digits than its factorization.

172198740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1646 (or 1637 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 39.

The square root of 172198740 is about 13122.4517526261. The cubic root of 172198740 is about 556.3438903920.

The spelling of 172198740 in words is "one hundred seventy-two million, one hundred ninety-eight thousand, seven hundred forty".