4028138028 has 36 divisors (see below), whose sum is σ = 10624945968. Its totient is φ = 1284333600.

The previous prime is 4028138017. The next prime is 4028138039. The reversal of 4028138028 is 8208318204.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (4028138017) and next prime (4028138039).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 4028137983 and 4028138001.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2431623 + ... + 2433278.

It is an arithmetic number, because the mean of its divisors is an integer number (295137388).

Almost surely, 2^4028138028 is an apocalyptic number.

It is an amenable number.

4028138028 is an abundant number, since it is smaller than the sum of its proper divisors (6596807940).

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

4028138028 is a wasteful number, since it uses less digits than its factorization.

4028138028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4864934 (or 4864929 counting only the distinct ones).

The product of its (nonzero) digits is 24576, while the sum is 36.

The square root of 4028138028 is about 63467.6140090361. The cubic root of 4028138028 is about 1591.1145525876.

The spelling of 4028138028 in words is "four billion, twenty-eight million, one hundred thirty-eight thousand, twenty-eight".