5621418 has 72 divisors (see below), whose sum is σ = 14004900. Its totient is φ = 1626240.

The previous prime is 5621417. The next prime is 5621419. The reversal of 5621418 is 8141265.

It is an interprime number because it is at equal distance from previous prime (5621417) and next prime (5621419).

It can be written as a sum of positive squares in 2 ways, for example, as 5489649 + 131769 = 2343^2 + 363^2 .

It is a junction number, because it is equal to n+sod(n) for n = 5621391 and 5621400.

It is not an unprimeable number, because it can be changed into a prime (5621417) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 63118 + ... + 63206.

Almost surely, 2^5621418 is an apocalyptic number.

5621418 is a gapful number since it is divisible by the number (58) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5621418, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7002450).

5621418 is an abundant number, since it is smaller than the sum of its proper divisors (8383482).

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

5621418 is a wasteful number, since it uses less digits than its factorization.

5621418 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 134 counting only the distinct ones).

The product of its digits is 1920, while the sum is 27.

The square root of 5621418 is about 2370.9529729626. The cubic root of 5621418 is about 177.8069067142.

The spelling of 5621418 in words is "five million, six hundred twenty-one thousand, four hundred eighteen".