1087889408 has 84 divisors (see below), whose sum is σ = 2258232720. Its totient is φ = 523960320.

The previous prime is 1087889393. The next prime is 1087889423. The reversal of 1087889408 is 8049887801.

It is an interprime number because it is at equal distance from previous prime (1087889393) and next prime (1087889423).

It is a self number, because there is not a number n which added to its sum of digits gives 1087889408.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 13770713 + ... + 13770791.

Almost surely, 2^1087889408 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 1087889408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1129116360).

1087889408 is an abundant number, since it is smaller than the sum of its proper divisors (1170343312).

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

1087889408 is an frugal number, since it uses more digits than its factorization.

1087889408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 187 (or 122 counting only the distinct ones).

The product of its (nonzero) digits is 1032192, while the sum is 53.

The square root of 1087889408 is about 32983.1685560984. The cubic root of 1087889408 is about 1028.4777866543.

The spelling of 1087889408 in words is "one billion, eighty-seven million, eight hundred eighty-nine thousand, four hundred eight".