1987078212 has 72 divisors (see below), whose sum is σ = 5747728896. Its totient is φ = 567016704.

The previous prime is 1987078211. The next prime is 1987078213. The reversal of 1987078212 is 2128707891.

It is an interprime number because it is at equal distance from previous prime (1987078211) and next prime (1987078213).

It is not an unprimeable number, because it can be changed into a prime (1987078211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 212908 + ... + 222044.

It is an arithmetic number, because the mean of its divisors is an integer number (79829568).

Almost surely, 2^1987078212 is an apocalyptic number.

1987078212 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1987078212 is an abundant number, since it is smaller than the sum of its proper divisors (3760650684).

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

1987078212 is a wasteful number, since it uses less digits than its factorization.

1987078212 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10017 (or 10012 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 45.

The square root of 1987078212 is about 44576.6554600051. The cubic root of 1987078212 is about 1257.2017797033.

The spelling of 1987078212 in words is "one billion, nine hundred eighty-seven million, seventy-eight thousand, two hundred twelve".