172963998 has 56 divisors (see below), whose sum is σ = 393322608. Its totient is φ = 57013632.

The previous prime is 172963991. The next prime is 172964003. The reversal of 172963998 is 899369271.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (172963991) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 140815 + ... + 142037.

It is an arithmetic number, because the mean of its divisors is an integer number (7023618).

Almost surely, 2^172963998 is an apocalyptic number.

172963998 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 172963998, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (196661304).

172963998 is an abundant number, since it is smaller than the sum of its proper divisors (220358610).

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

172963998 is an equidigital number, since it uses as much as digits as its factorization.

172963998 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1340 (or 1325 counting only the distinct ones).

The product of its digits is 1469664, while the sum is 54.

The square root of 172963998 is about 13151.5777760693. The cubic root of 172963998 is about 557.1668106354.

The spelling of 172963998 in words is "one hundred seventy-two million, nine hundred sixty-three thousand, nine hundred ninety-eight".