172103400 has 384 divisors, whose sum is σ = 705312000. Its totient is φ = 37739520.

The previous prime is 172103389. The next prime is 172103431. The reversal of 172103400 is 4301271.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 1096122 + ... + 1096278.

It is an arithmetic number, because the mean of its divisors is an integer number (1836750).

Almost surely, 2^172103400 is an apocalyptic number.

172103400 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 172103400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (352656000).

172103400 is an abundant number, since it is smaller than the sum of its proper divisors (533208600).

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

172103400 is a wasteful number, since it uses less digits than its factorization.

172103400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 218 (or 203 counting only the distinct ones).

The product of its (nonzero) digits is 168, while the sum is 18.

The square root of 172103400 is about 13118.8185443660. The cubic root of 172103400 is about 556.2411958376.

Adding to 172103400 its reverse (4301271), we get a palindrome (176404671).

The spelling of 172103400 in words is "one hundred seventy-two million, one hundred three thousand, four hundred".