1138658768 has 40 divisors (see below), whose sum is σ = 2452509696. Its totient is φ = 508579200.

The previous prime is 1138658767. The next prime is 1138658777. The reversal of 1138658768 is 8678568311.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138658767) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 81848 + ... + 94743.

Almost surely, 2^1138658768 is an apocalyptic number.

It is an amenable number.

1138658768 is an abundant number, since it is smaller than the sum of its proper divisors (1313850928).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1138658768 is a wasteful number, since it uses less digits than its factorization.

1138658768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 176643 (or 176637 counting only the distinct ones).

The product of its digits is 1935360, while the sum is 53.

The square root of 1138658768 is about 33744.0182550923. The cubic root of 1138658768 is about 1044.2340848047.

The spelling of 1138658768 in words is "one billion, one hundred thirty-eight million, six hundred fifty-eight thousand, seven hundred sixty-eight".