3138250440 has 64 divisors (see below), whose sum is σ = 10138968000. Its totient is φ = 772492032.

The previous prime is 3138250361. The next prime is 3138250441. The reversal of 3138250440 is 440528313.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 3138250398 and 3138250407.

It is not an unprimeable number, because it can be changed into a prime (3138250441) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 1004290 + ... + 1007409.

It is an arithmetic number, because the mean of its divisors is an integer number (158421375).

Almost surely, 2^3138250440 is an apocalyptic number.

3138250440 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3138250440 is an abundant number, since it is smaller than the sum of its proper divisors (7000717560).

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

3138250440 is a wasteful number, since it uses less digits than its factorization.

3138250440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2011726 (or 2011722 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 3138250440 is about 56020.0896107816. The cubic root of 3138250440 is about 1464.0723298792.

Adding to 3138250440 its reverse (440528313), we get a palindrome (3578778753).

The spelling of 3138250440 in words is "three billion, one hundred thirty-eight million, two hundred fifty thousand, four hundred forty".