1987385386 has 32 divisors (see below), whose sum is σ = 3527193600. Its totient is φ = 821836800.

The previous prime is 1987385363. The next prime is 1987385401. The reversal of 1987385386 is 6835837891.

It is a self number, because there is not a number n which added to its sum of digits gives 1987385386.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 144906 + ... + 158026.

It is an arithmetic number, because the mean of its divisors is an integer number (110224800).

Almost surely, 2^1987385386 is an apocalyptic number.

1987385386 is a deficient number, since it is larger than the sum of its proper divisors (1539808214).

1987385386 is a wasteful number, since it uses less digits than its factorization.

1987385386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13510.

The product of its digits is 8709120, while the sum is 58.

The square root of 1987385386 is about 44580.1007849915. The cubic root of 1987385386 is about 1257.2665581973.

The spelling of 1987385386 in words is "one billion, nine hundred eighty-seven million, three hundred eighty-five thousand, three hundred eighty-six".