1809425388 has 24 divisors (see below), whose sum is σ = 4255240192. Its totient is φ = 598392144.

The previous prime is 1809425381. The next prime is 1809425417. The reversal of 1809425388 is 8835249081.

It is not an unprimeable number, because it can be changed into a prime (1809425381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 592120 + ... + 595167.

Almost surely, 2^1809425388 is an apocalyptic number.

It is an amenable number.

1809425388 is an abundant number, since it is smaller than the sum of its proper divisors (2445814804).

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

1809425388 is a wasteful number, since it uses less digits than its factorization.

1809425388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1187421 (or 1187419 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 48.

The square root of 1809425388 is about 42537.3411016721. The cubic root of 1809425388 is about 1218.5599303225.

The spelling of 1809425388 in words is "one billion, eight hundred nine million, four hundred twenty-five thousand, three hundred eighty-eight".