1087188646 has 4 divisors (see below), whose sum is σ = 1630782972. Its totient is φ = 543594322.

The previous prime is 1087188637. The next prime is 1087188659. The reversal of 1087188646 is 6468817801.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a self number, because there is not a number n which added to its sum of digits gives 1087188646.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 271797160 + ... + 271797163.

It is an arithmetic number, because the mean of its divisors is an integer number (407695743).

Almost surely, 2^1087188646 is an apocalyptic number.

1087188646 is a deficient number, since it is larger than the sum of its proper divisors (543594326).

1087188646 is an equidigital number, since it uses as much as digits as its factorization.

1087188646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 543594325.

The product of its (nonzero) digits is 516096, while the sum is 49.

The square root of 1087188646 is about 32972.5438205790. The cubic root of 1087188646 is about 1028.2569085177.

The spelling of 1087188646 in words is "one billion, eighty-seven million, one hundred eighty-eight thousand, six hundred forty-six".