1138949712 has 60 divisors (see below), whose sum is σ = 3297402420. Its totient is φ = 366557184.

The previous prime is 1138949711. The next prime is 1138949717. The reversal of 1138949712 is 2179498311.

It can be written as a sum of positive squares in 2 ways, for example, as 923916816 + 215032896 = 30396^2 + 14664^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1138949711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 132193 + ... + 140544.

It is an arithmetic number, because the mean of its divisors is an integer number (54956707).

Almost surely, 2^1138949712 is an apocalyptic number.

1138949712 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1138949712 is an abundant number, since it is smaller than the sum of its proper divisors (2158452708).

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

1138949712 is a wasteful number, since it uses less digits than its factorization.

1138949712 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 272780 (or 272771 counting only the distinct ones).

The product of its digits is 108864, while the sum is 45.

The square root of 1138949712 is about 33748.3290253014. The cubic root of 1138949712 is about 1044.3230162673.

The spelling of 1138949712 in words is "one billion, one hundred thirty-eight million, nine hundred forty-nine thousand, seven hundred twelve".