3138611240 has 64 divisors (see below), whose sum is σ = 7207263360. Its totient is φ = 1229679360.

The previous prime is 3138611233. The next prime is 3138611263. The reversal of 3138611240 is 421168313.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2049275 + ... + 2050805.

It is an arithmetic number, because the mean of its divisors is an integer number (112613490).

Almost surely, 2^3138611240 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3138611240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3603631680).

3138611240 is an abundant number, since it is smaller than the sum of its proper divisors (4068652120).

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

3138611240 is a wasteful number, since it uses less digits than its factorization.

3138611240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2562 (or 2558 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 3138611240 is about 56023.3097915502. The cubic root of 3138611240 is about 1464.1284351375.

Adding to 3138611240 its reverse (421168313), we get a palindrome (3559779553).

The spelling of 3138611240 in words is "three billion, one hundred thirty-eight million, six hundred eleven thousand, two hundred forty".