190900728 has 96 divisors (see below), whose sum is σ = 540259200. Its totient is φ = 60888960.

The previous prime is 190900709. The next prime is 190900729. The reversal of 190900728 is 827009091.

It is a happy number.

190900728 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 (36).

It is a junction number, because it is equal to n+sod(n) for n = 190900692 and 190900701.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190900729) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2144908 + ... + 2144996.

It is an arithmetic number, because the mean of its divisors is an integer number (5627700).

Almost surely, 2^190900728 is an apocalyptic number.

190900728 is a gapful number since it is divisible by the number (18) 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 190900728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (270129600).

190900728 is an abundant number, since it is smaller than the sum of its proper divisors (349358472).

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

190900728 is an equidigital number, since it uses as much as digits as its factorization.

190900728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 194 (or 125 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 36.

The square root of 190900728 is about 13816.6829593792. The cubic root of 190900728 is about 575.7967309373.

The spelling of 190900728 in words is "one hundred ninety million, nine hundred thousand, seven hundred twenty-eight".