172247040 has 384 divisors, whose sum is σ = 707616000. Its totient is φ = 38928384.

The previous prime is 172247011. The next prime is 172247041. The reversal of 172247040 is 40742271.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (384).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a junction number, because it is equal to n+sod(n) for n = 172246995 and 172247013.

It is not an unprimeable number, because it can be changed into a prime (172247041) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1935316 + ... + 1935404.

It is an arithmetic number, because the mean of its divisors is an integer number (1842750).

Almost surely, 2^172247040 is an apocalyptic number.

172247040 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 172247040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (353808000).

172247040 is an abundant number, since it is smaller than the sum of its proper divisors (535368960).

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

172247040 is an equidigital number, since it uses as much as digits as its factorization.

172247040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132 (or 106 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 27.

The square root of 172247040 is about 13124.2919809032. The cubic root of 172247040 is about 556.3959018022.

The spelling of 172247040 in words is "one hundred seventy-two million, two hundred forty-seven thousand, forty".