6238644540 has 24 divisors (see below), whose sum is σ = 17468204880. Its totient is φ = 1663638528.

The previous prime is 6238644463. The next prime is 6238644541. The reversal of 6238644540 is 454468326.

It is a junction number, because it is equal to n+sod(n) for n = 6238644492 and 6238644501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6238644541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51988645 + ... + 51988764.

It is an arithmetic number, because the mean of its divisors is an integer number (727841870).

Almost surely, 2^6238644540 is an apocalyptic number.

6238644540 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

6238644540 is an abundant number, since it is smaller than the sum of its proper divisors (11229560340).

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

6238644540 is a wasteful number, since it uses less digits than its factorization.

6238644540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103977421 (or 103977419 counting only the distinct ones).

The product of its (nonzero) digits is 552960, while the sum is 42.

The square root of 6238644540 is about 78985.0906184199. The cubic root of 6238644540 is about 1840.8995030923.

The spelling of 6238644540 in words is "six billion, two hundred thirty-eight million, six hundred forty-four thousand, five hundred forty".