1985680004 has 48 divisors (see below), whose sum is σ = 4393460736. Its totient is φ = 762736800.

The previous prime is 1985680001. The next prime is 1985680007. The reversal of 1985680004 is 4000865891.

It is an interprime number because it is at equal distance from previous prime (1985680001) and next prime (1985680007).

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (1985680001) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 23534 + ... + 67269.

It is an arithmetic number, because the mean of its divisors is an integer number (91530432).

Almost surely, 2^1985680004 is an apocalyptic number.

1985680004 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1985680004 is an abundant number, since it is smaller than the sum of its proper divisors (2407780732).

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

1985680004 is a wasteful number, since it uses less digits than its factorization.

1985680004 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90896 (or 90894 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 1985680004 is about 44560.9695136899. The cubic root of 1985680004 is about 1256.9068337477.

The spelling of 1985680004 in words is "one billion, nine hundred eighty-five million, six hundred eighty thousand, four".