1138138460 has 24 divisors (see below), whose sum is σ = 2407542480. Its totient is φ = 451931264.

The previous prime is 1138138453. The next prime is 1138138481. The reversal of 1138138460 is 648318311.

It is a self number, because there is not a number n which added to its sum of digits gives 1138138460.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 204950 + ... + 210429.

It is an arithmetic number, because the mean of its divisors is an integer number (100314270).

Almost surely, 2^1138138460 is an apocalyptic number.

1138138460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1138138460 is an abundant number, since it is smaller than the sum of its proper divisors (1269404020).

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

1138138460 is a wasteful number, since it uses less digits than its factorization.

1138138460 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 415525 (or 415523 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 35.

The square root of 1138138460 is about 33736.3077410673. The cubic root of 1138138460 is about 1044.0750069664.

The spelling of 1138138460 in words is "one billion, one hundred thirty-eight million, one hundred thirty-eight thousand, four hundred sixty".