1908995556 has 48 divisors (see below), whose sum is σ = 4812220224. Its totient is φ = 585515136.

The previous prime is 1908995551. The next prime is 1908995573. The reversal of 1908995556 is 6555998091.

It is a junction number, because it is equal to n+sod(n) for n = 1908995496 and 1908995505.

It is not an unprimeable number, because it can be changed into a prime (1908995551) 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 15 ways as a sum of consecutive naturals, for example, 30151 + ... + 68753.

It is an arithmetic number, because the mean of its divisors is an integer number (100254588).

Almost surely, 2^1908995556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1908995556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2406110112).

1908995556 is an abundant number, since it is smaller than the sum of its proper divisors (2903224668).

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

1908995556 is a wasteful number, since it uses less digits than its factorization.

1908995556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 38940 (or 38938 counting only the distinct ones).

The product of its (nonzero) digits is 4374000, while the sum is 57.

The square root of 1908995556 is about 43692.0536940071. The cubic root of 1908995556 is about 1240.5139120256.

The spelling of 1908995556 in words is "one billion, nine hundred eight million, nine hundred ninety-five thousand, five hundred fifty-six".