1985678716 has 12 divisors (see below), whose sum is σ = 3971357488. Its totient is φ = 851005152.

The previous prime is 1985678713. The next prime is 1985678719. The reversal of 1985678716 is 6178765891.

It is an interprime number because it is at equal distance from previous prime (1985678713) and next prime (1985678719).

1985678716 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1985678713) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 35458521 + ... + 35458576.

Almost surely, 2^1985678716 is an apocalyptic number.

It is an amenable number.

1985678716 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

1985678716 is a wasteful number, since it uses less digits than its factorization.

1985678716 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70917108 (or 70917106 counting only the distinct ones).

The product of its digits is 5080320, while the sum is 58.

The square root of 1985678716 is about 44560.9550615783. The cubic root of 1985678716 is about 1256.9065619858.

The spelling of 1985678716 in words is "one billion, nine hundred eighty-five million, six hundred seventy-eight thousand, seven hundred sixteen".