5621994 has 64 divisors (see below), whose sum is σ = 14515200. Its totient is φ = 1579824.

The previous prime is 5621989. The next prime is 5622007. The reversal of 5621994 is 4991265.

5621994 is a `hidden beast` number, since 562 + 1 + 9 + 94 = 666.

5621994 is nontrivially palindromic in base 8.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 40377 + ... + 40515.

It is an arithmetic number, because the mean of its divisors is an integer number (226800).

Almost surely, 2^5621994 is an apocalyptic number.

5621994 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 5621994, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (7257600).

5621994 is an abundant number, since it is smaller than the sum of its proper divisors (8893206).

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

5621994 is a wasteful number, since it uses less digits than its factorization.

5621994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264 (or 258 counting only the distinct ones).

The product of its digits is 19440, while the sum is 36.

The square root of 5621994 is about 2371.0744399955. The cubic root of 5621994 is about 177.8129795165.

It can be divided in two parts, 562 and 1994, that added together give a triangular number (2556 = T₇₁).

The spelling of 5621994 in words is "five million, six hundred twenty-one thousand, nine hundred ninety-four".