1138500728 has 16 divisors (see below), whose sum is σ = 2135085480. Its totient is φ = 569144608.

The previous prime is 1138500719. The next prime is 1138500739. The reversal of 1138500728 is 8270058311.

It is a congruent number.

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, 50726 + ... + 69642.

Almost surely, 2^1138500728 is an apocalyptic number.

It is an amenable number.

1138500728 is a deficient number, since it is larger than the sum of its proper divisors (996584752).

1138500728 is a wasteful number, since it uses less digits than its factorization.

1138500728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26446 (or 26442 counting only the distinct ones).

The product of its (nonzero) digits is 13440, while the sum is 35.

The square root of 1138500728 is about 33741.6764254534. The cubic root of 1138500728 is about 1044.1857711234.

The spelling of 1138500728 in words is "one billion, one hundred thirty-eight million, five hundred thousand, seven hundred twenty-eight".