1898456825 has 12 divisors (see below), whose sum is σ = 2411504508. Its totient is φ = 1481721600.

The previous prime is 1898456753. The next prime is 1898456863. The reversal of 1898456825 is 5286548981.

It can be written as a sum of positive squares in 6 ways, for example, as 767345401 + 1131111424 = 27701^2 + 33632^2 .

It is a de Polignac number, because none of the positive numbers 2^k-1898456825 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 925052 + ... + 927101.

It is an arithmetic number, because the mean of its divisors is an integer number (200958709).

Almost surely, 2^1898456825 is an apocalyptic number.

It is an amenable number.

1898456825 is a deficient number, since it is larger than the sum of its proper divisors (513047683).

1898456825 is a wasteful number, since it uses less digits than its factorization.

1898456825 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1852204 (or 1852199 counting only the distinct ones).

The product of its digits is 5529600, while the sum is 56.

The square root of 1898456825 is about 43571.2844084266. The cubic root of 1898456825 is about 1238.2269197859.

The spelling of 1898456825 in words is "one billion, eight hundred ninety-eight million, four hundred fifty-six thousand, eight hundred twenty-five".