1891124852 has 6 divisors (see below), whose sum is σ = 3309468498. Its totient is φ = 945562424.

The previous prime is 1891124849. The next prime is 1891124881. The reversal of 1891124852 is 2584211981.

It can be written as a sum of positive squares in only one way, i.e., 1858816996 + 32307856 = 43114^2 + 5684^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 236390603 + ... + 236390610.

It is an arithmetic number, because the mean of its divisors is an integer number (551578083).

Almost surely, 2^1891124852 is an apocalyptic number.

It is an amenable number.

1891124852 is a deficient number, since it is larger than the sum of its proper divisors (1418343646).

1891124852 is a wasteful number, since it uses less digits than its factorization.

1891124852 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472781217 (or 472781215 counting only the distinct ones).

The product of its digits is 46080, while the sum is 41.

The square root of 1891124852 is about 43487.0653413173. The cubic root of 1891124852 is about 1236.6308236266.

The spelling of 1891124852 in words is "one billion, eight hundred ninety-one million, one hundred twenty-four thousand, eight hundred fifty-two".