172478448 has 30 divisors (see below), whose sum is σ = 482700504. Its totient is φ = 57492768.

The previous prime is 172478441. The next prime is 172478507. The reversal of 172478448 is 844874271.

172478448 is a `hidden beast` number, since 172 + 478 + 4 + 4 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172478441) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 598740 + ... + 599027.

Almost surely, 2^172478448 is an apocalyptic number.

172478448 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

172478448 is an abundant number, since it is smaller than the sum of its proper divisors (310222056).

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

172478448 is a wasteful number, since it uses less digits than its factorization.

172478448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1197781 (or 1197772 counting only the distinct ones).

The product of its digits is 401408, while the sum is 45.

The square root of 172478448 is about 13133.1050403170. The cubic root of 172478448 is about 556.6449565838.

The spelling of 172478448 in words is "one hundred seventy-two million, four hundred seventy-eight thousand, four hundred forty-eight".