1987956064 has 24 divisors (see below), whose sum is σ = 4144012488. Its totient is φ = 935508480.

The previous prime is 1987956059. The next prime is 1987956109. The reversal of 1987956064 is 4606597891.

It is a junction number, because it is equal to n+sod(n) for n = 1987955996 and 1987956014.

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, 1826622 + ... + 1827709.

It is an arithmetic number, because the mean of its divisors is an integer number (172667187).

Almost surely, 2^1987956064 is an apocalyptic number.

It is an amenable number.

1987956064 is an abundant number, since it is smaller than the sum of its proper divisors (2156056424).

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

1987956064 is a wasteful number, since it uses less digits than its factorization.

1987956064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3654358 (or 3654350 counting only the distinct ones).

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 1987956064 is about 44586.5009167573. The cubic root of 1987956064 is about 1257.3868881049.

The spelling of 1987956064 in words is "one billion, nine hundred eighty-seven million, nine hundred fifty-six thousand, sixty-four".