1087947920 has 40 divisors (see below), whose sum is σ = 2533066296. Its totient is φ = 434562048.

The previous prime is 1087947899. The next prime is 1087947941. The reversal of 1087947920 is 297497801.

It is an interprime number because it is at equal distance from previous prime (1087947899) and next prime (1087947941).

It can be written as a sum of positive squares in 4 ways, for example, as 148157584 + 939790336 = 12172^2 + 30656^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 49364 + ... + 67916.

Almost surely, 2^1087947920 is an apocalyptic number.

1087947920 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1087947920 is an abundant number, since it is smaller than the sum of its proper divisors (1445118376).

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

1087947920 is a wasteful number, since it uses less digits than its factorization.

1087947920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19299 (or 19293 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 47.

The square root of 1087947920 is about 32984.0555420342. The cubic root of 1087947920 is about 1028.4962251748.

The spelling of 1087947920 in words is "one billion, eighty-seven million, nine hundred forty-seven thousand, nine hundred twenty".