172669872 has 80 divisors (see below), whose sum is σ = 477648000. Its totient is φ = 53586432.

The previous prime is 172669823. The next prime is 172669873. The reversal of 172669872 is 278966271.

172669872 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 (48).

It is not an unprimeable number, because it can be changed into a prime (172669873) 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, 52204 + ... + 55412.

It is an arithmetic number, because the mean of its divisors is an integer number (5970600).

Almost surely, 2^172669872 is an apocalyptic number.

172669872 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 172669872, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (238824000).

172669872 is an abundant number, since it is smaller than the sum of its proper divisors (304978128).

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

172669872 is a wasteful number, since it uses less digits than its factorization.

172669872 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3298 (or 3292 counting only the distinct ones).

The product of its digits is 508032, while the sum is 48.

The square root of 172669872 is about 13140.3908617666. The cubic root of 172669872 is about 556.8508099524.

The spelling of 172669872 in words is "one hundred seventy-two million, six hundred sixty-nine thousand, eight hundred seventy-two".