1880809428 has 12 divisors (see below), whose sum is σ = 4388555360. Its totient is φ = 626936472.

The previous prime is 1880809423. The next prime is 1880809451. The reversal of 1880809428 is 8249080881.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1880809423) 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 3 ways as a sum of consecutive naturals, for example, 78367048 + ... + 78367071.

Almost surely, 2^1880809428 is an apocalyptic number.

It is an amenable number.

1880809428 is an abundant number, since it is smaller than the sum of its proper divisors (2507745932).

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

1880809428 is a wasteful number, since it uses less digits than its factorization.

1880809428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156734126 (or 156734124 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 48.

The square root of 1880809428 is about 43368.2998052725. The cubic root of 1880809428 is about 1234.3782602642.

The spelling of 1880809428 in words is "one billion, eight hundred eighty million, eight hundred nine thousand, four hundred twenty-eight".