1087263920 has 20 divisors (see below), whose sum is σ = 2527888800. Its totient is φ = 434905536.

The previous prime is 1087263913. The next prime is 1087263941. The reversal of 1087263920 is 293627801.

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6795320 + ... + 6795479.

It is an arithmetic number, because the mean of its divisors is an integer number (126394440).

Almost surely, 2^1087263920 is an apocalyptic number.

1087263920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1087263920 is an abundant number, since it is smaller than the sum of its proper divisors (1440624880).

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

1087263920 is a wasteful number, since it uses less digits than its factorization.

1087263920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13590812 (or 13590806 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 1087263920 is about 32973.6852656781. The cubic root of 1087263920 is about 1028.2806392120.

The spelling of 1087263920 in words is "one billion, eighty-seven million, two hundred sixty-three thousand, nine hundred twenty".