173421432 has 64 divisors (see below), whose sum is σ = 487872000. Its totient is φ = 57069792.

The previous prime is 173421419. The next prime is 173421433. The reversal of 173421432 is 234124371.

It is a happy number.

173421432 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 173421396 and 173421405.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173421433) 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, 11983 + ... + 22145.

It is an arithmetic number, because the mean of its divisors is an integer number (7623000).

Almost surely, 2^173421432 is an apocalyptic number.

173421432 is a gapful number since it is divisible by the number (12) 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 173421432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (243936000).

173421432 is an abundant number, since it is smaller than the sum of its proper divisors (314450568).

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

173421432 is a wasteful number, since it uses less digits than its factorization.

173421432 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10257 (or 10247 counting only the distinct ones).

The product of its digits is 4032, while the sum is 27.

The square root of 173421432 is about 13168.9571341090. The cubic root of 173421432 is about 557.6575537861.

The spelling of 173421432 in words is "one hundred seventy-three million, four hundred twenty-one thousand, four hundred thirty-two".