190320400 has 120 divisors (see below), whose sum is σ = 483790464. Its totient is φ = 71808000.

The previous prime is 190320391. The next prime is 190320443. The reversal of 190320400 is 4023091.

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 23 ways as a sum of consecutive naturals, for example, 1260325 + ... + 1260475.

Almost surely, 2^190320400 is an apocalyptic number.

190320400 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 190320400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (241895232).

190320400 is an abundant number, since it is smaller than the sum of its proper divisors (293470064).

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

190320400 is a wasteful number, since it uses less digits than its factorization.

190320400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 329 (or 318 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 190320400 is about 13795.6659860987. The cubic root of 190320400 is about 575.2126749515.

Adding to 190320400 its reverse (4023091), we get a palindrome (194343491).

The spelling of 190320400 in words is "one hundred ninety million, three hundred twenty thousand, four hundred".