190800820 has 24 divisors (see below), whose sum is σ = 457922304. Its totient is φ = 65417376.

The previous prime is 190800803. The next prime is 190800821. The reversal of 190800820 is 28008091.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190800821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 681292 + ... + 681571.

It is an arithmetic number, because the mean of its divisors is an integer number (19080096).

Almost surely, 2^190800820 is an apocalyptic number.

190800820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190800820 is an abundant number, since it is smaller than the sum of its proper divisors (267121484).

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

190800820 is a wasteful number, since it uses less digits than its factorization.

190800820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1362879 (or 1362877 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 28.

The square root of 190800820 is about 13813.0670019370. The cubic root of 190800820 is about 575.6962655648.

The spelling of 190800820 in words is "one hundred ninety million, eight hundred thousand, eight hundred twenty".