172428552 has 96 divisors (see below), whose sum is σ = 497858400. Its totient is φ = 53724672.

The previous prime is 172428551. The next prime is 172428563. The reversal of 172428552 is 255824271.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (172428551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 218703 + ... + 219489.

It is an arithmetic number, because the mean of its divisors is an integer number (5186025).

Almost surely, 2^172428552 is an apocalyptic number.

172428552 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 172428552, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (248929200).

172428552 is an abundant number, since it is smaller than the sum of its proper divisors (325429848).

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

172428552 is a wasteful number, since it uses less digits than its factorization.

172428552 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 995 (or 988 counting only the distinct ones).

The product of its digits is 44800, while the sum is 36.

The square root of 172428552 is about 13131.2052759829. The cubic root of 172428552 is about 556.5912744459.

It can be divided in two parts, 1724 and 28552, that added together give a square (30276 = 174²).

The spelling of 172428552 in words is "one hundred seventy-two million, four hundred twenty-eight thousand, five hundred fifty-two".