1387635386 has 8 divisors (see below), whose sum is σ = 2081629044. Its totient is φ = 693759040.

The previous prime is 1387635373. The next prime is 1387635407. The reversal of 1387635386 is 6835367831.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 862538161 + 525097225 = 29369^2 + 22915^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11756 + ... + 53976.

Almost surely, 2^1387635386 is an apocalyptic number.

1387635386 is a deficient number, since it is larger than the sum of its proper divisors (693993658).

1387635386 is a wasteful number, since it uses less digits than its factorization.

1387635386 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58656.

The product of its digits is 2177280, while the sum is 50.

The square root of 1387635386 is about 37250.9783227233. The cubic root of 1387635386 is about 1115.3858279864.

The spelling of 1387635386 in words is "one billion, three hundred eighty-seven million, six hundred thirty-five thousand, three hundred eighty-six".