191400 has 96 divisors (see below), whose sum is σ = 669600. Its totient is φ = 44800.

The previous prime is 191353. The next prime is 191413. The reversal of 191400 is 4191.

191400 is digitally balanced in base 3, 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 (15).

It is a nialpdrome in base 5.

It is a zygodrome in base 5.

It is a self number, because there is not a number n which added to its sum of digits gives 191400.

It is an unprimeable number.

191400 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6586 + ... + 6614.

It is an arithmetic number, because the mean of its divisors is an integer number (6975).

2¹⁹¹⁴⁰⁰ is an apocalyptic number.

191400 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 191400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (334800).

191400 is an abundant number, since it is smaller than the sum of its proper divisors (478200).

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

191400 is a wasteful number, since it uses less digits than its factorization.

191400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59 (or 50 counting only the distinct ones).

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 191400 is about 437.4928570845. The cubic root of 191400 is about 57.6298263737.

Adding to 191400 its reverse (4191), we get a palindrome (195591).

The spelling of 191400 in words is "one hundred ninety-one thousand, four hundred".