1987602656 has 24 divisors (see below), whose sum is σ = 4214100744. Its totient is φ = 917354880.

The previous prime is 1987602649. The next prime is 1987602671. The reversal of 1987602656 is 6562067891.

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, 2388530 + ... + 2389361.

It is an arithmetic number, because the mean of its divisors is an integer number (175587531).

Almost surely, 2^1987602656 is an apocalyptic number.

1987602656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1987602656 is an abundant number, since it is smaller than the sum of its proper divisors (2226498088).

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

1987602656 is a wasteful number, since it uses less digits than its factorization.

1987602656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4777914 (or 4777906 counting only the distinct ones).

The product of its (nonzero) digits is 1088640, while the sum is 50.

The square root of 1987602656 is about 44582.5375679761. The cubic root of 1987602656 is about 1257.3123732252.

The spelling of 1987602656 in words is "one billion, nine hundred eighty-seven million, six hundred two thousand, six hundred fifty-six".