2238028405 has 4 divisors (see below), whose sum is σ = 2685634092. Its totient is φ = 1790422720.

The previous prime is 2238028391. The next prime is 2238028421. The reversal of 2238028405 is 5048208322.

It is a happy number.

2238028405 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 5048208322 = 2 ⋅2524104161.

It can be written as a sum of positive squares in 2 ways, for example, as 924038404 + 1313990001 = 30398^2 + 36249^2 .

It is not a de Polignac number, because 2238028405 - 2⁷ = 2238028277 is a prime.

It is a super-2 number, since 2×2238028405² = 10017542283173688050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 223802836 + ... + 223802845.

It is an arithmetic number, because the mean of its divisors is an integer number (671408523).

Almost surely, 2^2238028405 is an apocalyptic number.

It is an amenable number.

2238028405 is a deficient number, since it is larger than the sum of its proper divisors (447605687).

2238028405 is an equidigital number, since it uses as much as digits as its factorization.

2238028405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 447605686.

The product of its (nonzero) digits is 30720, while the sum is 34.

The square root of 2238028405 is about 47307.8049057447. The cubic root of 2238028405 is about 1308.0425293696.

The spelling of 2238028405 in words is "two billion, two hundred thirty-eight million, twenty-eight thousand, four hundred five".