190028001820 has 24 divisors (see below), whose sum is σ = 420061899600. Its totient is φ = 72010611072.

The previous prime is 190028001791. The next prime is 190028001827. The reversal of 190028001820 is 28100820091.

It is a happy number.

It is a super-2 number, since 2×190028001820² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (190028001827) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 250036465 + ... + 250037224.

It is an arithmetic number, because the mean of its divisors is an integer number (17502579150).

Almost surely, 2^190028001820 is an apocalyptic number.

190028001820 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

190028001820 is an abundant number, since it is smaller than the sum of its proper divisors (230033897780).

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

190028001820 is a wasteful number, since it uses less digits than its factorization.

190028001820 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 500073717 (or 500073715 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 31.

The spelling of 190028001820 in words is "one hundred ninety billion, twenty-eight million, one thousand, eight hundred twenty".