1387329686 has 32 divisors (see below), whose sum is σ = 2217093120. Its totient is φ = 649713856.

The previous prime is 1387329673. The next prime is 1387329703. The reversal of 1387329686 is 6869237831.

It is a congruent number.

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, 436475 + ... + 439641.

It is an arithmetic number, because the mean of its divisors is an integer number (69284160).

Almost surely, 2^1387329686 is an apocalyptic number.

1387329686 is a deficient number, since it is larger than the sum of its proper divisors (829763434).

1387329686 is a wasteful number, since it uses less digits than its factorization.

1387329686 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3388.

The product of its digits is 2612736, while the sum is 53.

The square root of 1387329686 is about 37246.8748487709. The cubic root of 1387329686 is about 1115.3039144200.

The spelling of 1387329686 in words is "one billion, three hundred eighty-seven million, three hundred twenty-nine thousand, six hundred eighty-six".