4138791540 has 48 divisors (see below), whose sum is σ = 12480050688. Its totient is φ = 1018779264.

The previous prime is 4138791533. The next prime is 4138791541. The reversal of 4138791540 is 451978314.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 4138791492 and 4138791501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4138791541) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2652292 + ... + 2653851.

It is an arithmetic number, because the mean of its divisors is an integer number (260001056).

Almost surely, 2^4138791540 is an apocalyptic number.

It is an amenable number.

4138791540 is an abundant number, since it is smaller than the sum of its proper divisors (8341259148).

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

4138791540 is a wasteful number, since it uses less digits than its factorization.

4138791540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5306168 (or 5306166 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 4138791540 is about 64333.4402935208. The cubic root of 4138791540 is about 1605.5525237392.

The spelling of 4138791540 in words is "four billion, one hundred thirty-eight million, seven hundred ninety-one thousand, five hundred forty".