1987853285 has 16 divisors (see below), whose sum is σ = 2692016640. Its totient is φ = 1395858240.

The previous prime is 1987853267. The next prime is 1987853303. The reversal of 1987853285 is 5823587891.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1987853267) and next prime (1987853303).

It is not a de Polignac number, because 1987853285 - 2¹⁶ = 1987787749 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1987853285.

It is a congruent number.

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, 621557 + ... + 624746.

It is an arithmetic number, because the mean of its divisors is an integer number (168251040).

Almost surely, 2^1987853285 is an apocalyptic number.

It is an amenable number.

1987853285 is a deficient number, since it is larger than the sum of its proper divisors (704163355).

1987853285 is a wasteful number, since it uses less digits than its factorization.

1987853285 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246348.

The product of its digits is 4838400, while the sum is 56.

The square root of 1987853285 is about 44585.3483220665. The cubic root of 1987853285 is about 1257.3652184117.

The spelling of 1987853285 in words is "one billion, nine hundred eighty-seven million, eight hundred fifty-three thousand, two hundred eighty-five".