1087621638728 has 32 divisors (see below), whose sum is σ = 2138757255360. Its totient is φ = 517526412480.

The previous prime is 1087621638703. The next prime is 1087621638743. The reversal of 1087621638728 is 8278361267801.

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, 14966258 + ... + 15038753.

It is an arithmetic number, because the mean of its divisors is an integer number (66836164230).

Almost surely, 2^{1087621638728} is an apocalyptic number.

It is an amenable number.

1087621638728 is a deficient number, since it is larger than the sum of its proper divisors (1051135616632).

1087621638728 is a wasteful number, since it uses less digits than its factorization.

1087621638728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30005237 (or 30005233 counting only the distinct ones).

The product of its (nonzero) digits is 10838016, while the sum is 59.

The spelling of 1087621638728 in words is "one trillion, eighty-seven billion, six hundred twenty-one million, six hundred thirty-eight thousand, seven hundred twenty-eight".