1031987992 has 64 divisors (see below), whose sum is σ = 2347729920. Its totient is φ = 415154688.

The previous prime is 1031987987. The next prime is 1031988031. The reversal of 1031987992 is 2997891301.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors.

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, 420513 + ... + 422959.

It is an arithmetic number, because the mean of its divisors is an integer number (36683280).

Almost surely, 2^1031987992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1031987992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1173864960).

1031987992 is an abundant number, since it is smaller than the sum of its proper divisors (1315741928).

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

1031987992 is a wasteful number, since it uses less digits than its factorization.

1031987992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2920 (or 2916 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 49.

The square root of 1031987992 is about 32124.5699115179. The cubic root of 1031987992 is about 1010.5509499359.

The spelling of 1031987992 in words is "one billion, thirty-one million, nine hundred eighty-seven thousand, nine hundred ninety-two".