1987161396 has 48 divisors (see below), whose sum is σ = 5061450240. Its totient is φ = 601786720.

The previous prime is 1987161377. The next prime is 1987161443. The reversal of 1987161396 is 6931617891.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 257425 + ... + 265031.

It is an arithmetic number, because the mean of its divisors is an integer number (105446880).

Almost surely, 2^1987161396 is an apocalyptic number.

It is an amenable number.

1987161396 is an abundant number, since it is smaller than the sum of its proper divisors (3074288844).

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

1987161396 is a wasteful number, since it uses less digits than its factorization.

1987161396 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9604 (or 9602 counting only the distinct ones).

The product of its digits is 489888, while the sum is 51.

The square root of 1987161396 is about 44577.5884946685. The cubic root of 1987161396 is about 1257.2193226487.

The spelling of 1987161396 in words is "one billion, nine hundred eighty-seven million, one hundred sixty-one thousand, three hundred ninety-six".