200109427428 has 24 divisors (see below), whose sum is σ = 466974904032. Its totient is φ = 66695584384.

The previous prime is 200109427423. The next prime is 200109427429. The reversal of 200109427428 is 824724901002.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (200109427423) 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, 833925 + ... + 1046732.

It is an arithmetic number, because the mean of its divisors is an integer number (19457287668).

Almost surely, 2^200109427428 is an apocalyptic number.

It is an amenable number.

200109427428 is an abundant number, since it is smaller than the sum of its proper divisors (266865476604).

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

200109427428 is a wasteful number, since it uses less digits than its factorization.

200109427428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1889531 (or 1889529 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 39.

The spelling of 200109427428 in words is "two hundred billion, one hundred nine million, four hundred twenty-seven thousand, four hundred twenty-eight".