1087157988 has 36 divisors (see below), whose sum is σ = 3140679360. Its totient is φ = 310616496.

The previous prime is 1087157969. The next prime is 1087158011. The reversal of 1087157988 is 8897517801.

It is a tau number, because it is divible by the number of its divisors (36).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2156808 + ... + 2157311.

Almost surely, 2^1087157988 is an apocalyptic number.

1087157988 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1087157988 is an abundant number, since it is smaller than the sum of its proper divisors (2053521372).

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

1087157988 is a wasteful number, since it uses less digits than its factorization.

1087157988 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4314136 (or 4314131 counting only the distinct ones).

The product of its (nonzero) digits is 1128960, while the sum is 54.

The square root of 1087157988 is about 32972.0789153490. The cubic root of 1087157988 is about 1028.2472430388.

The spelling of 1087157988 in words is "one billion, eighty-seven million, one hundred fifty-seven thousand, nine hundred eighty-eight".