1908812052 has 54 divisors (see below), whose sum is σ = 5612821578. Its totient is φ = 545374368.

The previous prime is 1908812023. The next prime is 1908812053. The reversal of 1908812052 is 2502188091.

It can be written as a sum of positive squares in only one way, i.e., 1896950916 + 11861136 = 43554^2 + 3444^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 1908811998 and 1908812016.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1908812053) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 539283 + ... + 542810.

Almost surely, 2^1908812052 is an apocalyptic number.

1908812052 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1908812052 is an abundant number, since it is smaller than the sum of its proper divisors (3704009526).

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

1908812052 is a wasteful number, since it uses less digits than its factorization.

1908812052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1082117 (or 1082105 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 36.

The square root of 1908812052 is about 43689.9536735850. The cubic root of 1908812052 is about 1240.4741622282.

The spelling of 1908812052 in words is "one billion, nine hundred eight million, eight hundred twelve thousand, fifty-two".