5438436 has 48 divisors (see below), whose sum is σ = 13716864. Its totient is φ = 1670656.

The previous prime is 5438429. The next prime is 5438437. The reversal of 5438436 is 6348345.

It is a super-2 number, since 2×5438436² = 59153172252192, which contains 22 as substring.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 5438397 and 5438406.

It is not an unprimeable number, because it can be changed into a prime (5438437) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10561 + ... + 11063.

It is an arithmetic number, because the mean of its divisors is an integer number (285768).

Almost surely, 2^5438436 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5438436, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6858432).

5438436 is an abundant number, since it is smaller than the sum of its proper divisors (8278428).

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

5438436 is a wasteful number, since it uses less digits than its factorization.

5438436 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 578 counting only the distinct ones).

The product of its digits is 34560, while the sum is 33.

The square root of 5438436 is about 2332.0454541025. The cubic root of 5438436 is about 175.8563307571.

Subtracting 5438436 from its reverse (6348345), we obtain a palindrome (909909).

The spelling of 5438436 in words is "five million, four hundred thirty-eight thousand, four hundred thirty-six".