172424540 has 48 divisors (see below), whose sum is σ = 388698912. Its totient is φ = 64014336.

The previous prime is 172424519. The next prime is 172424543. The reversal of 172424540 is 45424271.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172424543) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 21347 + ... + 28293.

It is an arithmetic number, because the mean of its divisors is an integer number (8097894).

Almost surely, 2^172424540 is an apocalyptic number.

172424540 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 172424540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (194349456).

172424540 is an abundant number, since it is smaller than the sum of its proper divisors (216274372).

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

172424540 is a wasteful number, since it uses less digits than its factorization.

172424540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7046 (or 7044 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 172424540 is about 13131.0525092241. The cubic root of 172424540 is about 556.5869575632.

The spelling of 172424540 in words is "one hundred seventy-two million, four hundred twenty-four thousand, five hundred forty".