1387015628 has 12 divisors (see below), whose sum is σ = 2451310512. Its totient is φ = 686641200.

The previous prime is 1387015579. The next prime is 1387015631. The reversal of 1387015628 is 8265107831.

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, 1716200 + ... + 1717007.

It is an arithmetic number, because the mean of its divisors is an integer number (204275876).

Almost surely, 2^1387015628 is an apocalyptic number.

It is an amenable number.

1387015628 is a deficient number, since it is larger than the sum of its proper divisors (1064294884).

1387015628 is a wasteful number, since it uses less digits than its factorization.

1387015628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3433312 (or 3433310 counting only the distinct ones).

The product of its (nonzero) digits is 80640, while the sum is 41.

The square root of 1387015628 is about 37242.6587128255. The cubic root of 1387015628 is about 1115.2197487612.

The spelling of 1387015628 in words is "one billion, three hundred eighty-seven million, fifteen thousand, six hundred twenty-eight".