5438128390 has 16 divisors (see below), whose sum is σ = 9875258208. Its totient is φ = 2156000896.

The previous prime is 5438128387. The next prime is 5438128403. The reversal of 5438128390 is 938218345.

It is a super-2 number, since 2×5438128390² = 59146480772247984200, which contains 22 as substring.

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, 2405122 + ... + 2407381.

It is an arithmetic number, because the mean of its divisors is an integer number (617203638).

Almost surely, 2^5438128390 is an apocalyptic number.

5438128390 is a deficient number, since it is larger than the sum of its proper divisors (4437129818).

5438128390 is a wasteful number, since it uses less digits than its factorization.

5438128390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4812623.

The product of its (nonzero) digits is 207360, while the sum is 43.

The square root of 5438128390 is about 73743.6667789174. Note that the first 3 decimals coincide. The cubic root of 5438128390 is about 1758.5301508658.

The spelling of 5438128390 in words is "five billion, four hundred thirty-eight million, one hundred twenty-eight thousand, three hundred ninety".