200401820 has 24 divisors (see below), whose sum is σ = 421890000. Its totient is φ = 79961472.

The previous prime is 200401813. The next prime is 200401823. The reversal of 200401820 is 28104002.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (200401823) 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, 4070 + ... + 20429.

It is an arithmetic number, because the mean of its divisors is an integer number (17578750).

Almost surely, 2^200401820 is an apocalyptic number.

200401820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

200401820 is an abundant number, since it is smaller than the sum of its proper divisors (221488180).

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

200401820 is a wasteful number, since it uses less digits than its factorization.

200401820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24917 (or 24915 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 17.

The square root of 200401820 is about 14156.3349776699. The cubic root of 200401820 is about 585.1949285875.

Adding to 200401820 its reverse (28104002), we get a palindrome (228505822).

The spelling of 200401820 in words is "two hundred million, four hundred one thousand, eight hundred twenty".