172478380 has 24 divisors (see below), whose sum is σ = 377953632. Its totient is φ = 65991552.

The previous prime is 172478353. The next prime is 172478387. The reversal of 172478380 is 83874271.

It is not an unprimeable number, because it can be changed into a prime (172478387) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 187017 + ... + 187936.

It is an arithmetic number, because the mean of its divisors is an integer number (15748068).

Almost surely, 2^172478380 is an apocalyptic number.

172478380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

172478380 is an abundant number, since it is smaller than the sum of its proper divisors (205475252).

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

172478380 is a wasteful number, since it uses less digits than its factorization.

172478380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 374985 (or 374983 counting only the distinct ones).

The product of its (nonzero) digits is 75264, while the sum is 40.

The square root of 172478380 is about 13133.1024514393. The cubic root of 172478380 is about 556.6448834309.

The spelling of 172478380 in words is "one hundred seventy-two million, four hundred seventy-eight thousand, three hundred eighty".