1987616772 has 48 divisors (see below), whose sum is σ = 5155987200. Its totient is φ = 662165280.

The previous prime is 1987616753. The next prime is 1987616789. The reversal of 1987616772 is 2776167891.

1987616772 is a `hidden beast` number, since 19 + 8 + 7 + 616 + 7 + 7 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240997 + ... + 249107.

It is an arithmetic number, because the mean of its divisors is an integer number (107416400).

Almost surely, 2^1987616772 is an apocalyptic number.

1987616772 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1987616772 is an abundant number, since it is smaller than the sum of its proper divisors (3168370428).

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

1987616772 is a wasteful number, since it uses less digits than its factorization.

1987616772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10393 (or 10385 counting only the distinct ones).

The product of its digits is 1778112, while the sum is 54.

The square root of 1987616772 is about 44582.6958808011. The cubic root of 1987616772 is about 1257.3153497054.

The spelling of 1987616772 in words is "one billion, nine hundred eighty-seven million, six hundred sixteen thousand, seven hundred seventy-two".