5128138026 has 160 divisors (see below), whose sum is σ = 13392086400. Its totient is φ = 1461525120.

The previous prime is 5128138003. The next prime is 5128138049. The reversal of 5128138026 is 6208318215.

It is a happy number.

5128138026 is a `hidden beast` number, since 512 + 8 + 138 + 0 + 2 + 6 = 666.

It is an interprime number because it is at equal distance from previous prime (5128138003) and next prime (5128138049).

It is a super-2 number, since 2×5128138026² = 52595599227414353352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3664875 + ... + 3666273.

It is an arithmetic number, because the mean of its divisors is an integer number (83700540).

Almost surely, 2^5128138026 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5128138026, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6696043200).

5128138026 is an abundant number, since it is smaller than the sum of its proper divisors (8263948374).

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

5128138026 is a wasteful number, since it uses less digits than its factorization.

5128138026 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1463 (or 1432 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The square root of 5128138026 is about 71611.0188867607. The cubic root of 5128138026 is about 1724.4604376753.

The spelling of 5128138026 in words is "five billion, one hundred twenty-eight million, one hundred thirty-eight thousand, twenty-six".