1538839964 has 6 divisors (see below), whose sum is σ = 2692969944. Its totient is φ = 769419980.

The previous prime is 1538839957. The next prime is 1538840029. The reversal of 1538839964 is 4699388351.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 192354992 + ... + 192354999.

It is an arithmetic number, because the mean of its divisors is an integer number (448828324).

Almost surely, 2^1538839964 is an apocalyptic number.

It is an amenable number.

1538839964 is a deficient number, since it is larger than the sum of its proper divisors (1154129980).

1538839964 is a wasteful number, since it uses less digits than its factorization.

1538839964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384709995 (or 384709993 counting only the distinct ones).

The product of its digits is 5598720, while the sum is 56.

The square root of 1538839964 is about 39228.0507290383. The cubic root of 1538839964 is about 1154.5103185853.

The spelling of 1538839964 in words is "one billion, five hundred thirty-eight million, eight hundred thirty-nine thousand, nine hundred sixty-four".