1987839896 has 32 divisors (see below), whose sum is σ = 4266030240. Its totient is φ = 850656768.

The previous prime is 1987839881. The next prime is 1987839967. The reversal of 1987839896 is 6989387891.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11696 + ... + 64128.

It is an arithmetic number, because the mean of its divisors is an integer number (133313445).

Almost surely, 2^1987839896 is an apocalyptic number.

It is an amenable number.

1987839896 is an abundant number, since it is smaller than the sum of its proper divisors (2278190344).

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

1987839896 is a wasteful number, since it uses less digits than its factorization.

1987839896 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 53123 (or 53119 counting only the distinct ones).

The product of its digits is 47029248, while the sum is 68.

The square root of 1987839896 is about 44585.1981715905. The cubic root of 1987839896 is about 1257.3623954500.

The spelling of 1987839896 in words is "one billion, nine hundred eighty-seven million, eight hundred thirty-nine thousand, eight hundred ninety-six".