1538378372 has 12 divisors (see below), whose sum is σ = 2696601600. Its totient is φ = 767920776.

The previous prime is 1538378353. The next prime is 1538378381. The reversal of 1538378372 is 2738738351.

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, 314372 + ... + 319227.

It is an arithmetic number, because the mean of its divisors is an integer number (224716800).

Almost surely, 2^1538378372 is an apocalyptic number.

It is an amenable number.

1538378372 is a deficient number, since it is larger than the sum of its proper divisors (1158223228).

1538378372 is a wasteful number, since it uses less digits than its factorization.

1538378372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634210 (or 634208 counting only the distinct ones).

The product of its digits is 846720, while the sum is 47.

The square root of 1538378372 is about 39222.1668447831. The cubic root of 1538378372 is about 1154.3948710117.

The spelling of 1538378372 in words is "one billion, five hundred thirty-eight million, three hundred seventy-eight thousand, three hundred seventy-two".