173878380 has 384 divisors, whose sum is σ = 650280960. Its totient is φ = 38154240.

The previous prime is 173878379. The next prime is 173878387. The reversal of 173878380 is 83878371.

173878380 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (173878387) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 3699517 + ... + 3699563.

It is an arithmetic number, because the mean of its divisors is an integer number (1693440).

Almost surely, 2^173878380 is an apocalyptic number.

173878380 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 173878380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (325140480).

173878380 is an abundant number, since it is smaller than the sum of its proper divisors (476402580).

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

173878380 is a wasteful number, since it uses less digits than its factorization.

173878380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126 (or 118 counting only the distinct ones).

The product of its (nonzero) digits is 225792, while the sum is 45.

The square root of 173878380 is about 13186.2951582315. The cubic root of 173878380 is about 558.1469147207.

Subtracting from 173878380 its reverse (83878371), we obtain a palindrome (90000009).

The spelling of 173878380 in words is "one hundred seventy-three million, eight hundred seventy-eight thousand, three hundred eighty".