1985820892 has 12 divisors (see below), whose sum is σ = 3791112696. Its totient is φ = 902645840.

The previous prime is 1985820871. The next prime is 1985820911. The reversal of 1985820892 is 2980285891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22566103 + ... + 22566190.

It is an arithmetic number, because the mean of its divisors is an integer number (315926058).

Almost surely, 2^1985820892 is an apocalyptic number.

It is an amenable number.

1985820892 is a deficient number, since it is larger than the sum of its proper divisors (1805291804).

1985820892 is a wasteful number, since it uses less digits than its factorization.

1985820892 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45132308 (or 45132306 counting only the distinct ones).

The product of its (nonzero) digits is 829440, while the sum is 52.

The square root of 1985820892 is about 44562.5503309674. The cubic root of 1985820892 is about 1256.9365597361.

The spelling of 1985820892 in words is "one billion, nine hundred eighty-five million, eight hundred twenty thousand, eight hundred ninety-two".