1987032140 has 12 divisors (see below), whose sum is σ = 4172767536. Its totient is φ = 794812848.

The previous prime is 1987032139. The next prime is 1987032143. The reversal of 1987032140 is 412307891.

It is a self number, because there is not a number n which added to its sum of digits gives 1987032140.

It is not an unprimeable number, because it can be changed into a prime (1987032143) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 49675784 + ... + 49675823.

It is an arithmetic number, because the mean of its divisors is an integer number (347730628).

Almost surely, 2^1987032140 is an apocalyptic number.

1987032140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1987032140 is an abundant number, since it is smaller than the sum of its proper divisors (2185735396).

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

1987032140 is a wasteful number, since it uses less digits than its factorization.

1987032140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 99351616 (or 99351614 counting only the distinct ones).

The product of its (nonzero) digits is 12096, while the sum is 35.

The square root of 1987032140 is about 44576.1386842782. The cubic root of 1987032140 is about 1257.1920632181.

The spelling of 1987032140 in words is "one billion, nine hundred eighty-seven million, thirty-two thousand, one hundred forty".