5138998990 has 16 divisors (see below), whose sum is σ = 9264375648. Its totient is φ = 2052449056.

The previous prime is 5138998979. The next prime is 5138999009. The reversal of 5138998990 is 998998315.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 386962 + ... + 400021.

It is an arithmetic number, because the mean of its divisors is an integer number (579023478).

Almost surely, 2^5138998990 is an apocalyptic number.

5138998990 is a deficient number, since it is larger than the sum of its proper divisors (4125376658).

5138998990 is a wasteful number, since it uses less digits than its factorization.

5138998990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 787643.

The product of its (nonzero) digits is 6298560, while the sum is 61.

The square root of 5138998990 is about 71686.8118275600. The cubic root of 5138998990 is about 1725.6769998279.

The spelling of 5138998990 in words is "five billion, one hundred thirty-eight million, nine hundred ninety-eight thousand, nine hundred ninety".