8420544 has 112 divisors (see below), whose sum is σ = 27066240. Its totient is φ = 2545920.

The previous prime is 8420543. The next prime is 8420563. The reversal of 8420544 is 4450248.

It is a super-2 number, since 2×8420544² = 141811122511872, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (8420543) 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, 18787 + ... + 19229.

Almost surely, 2^8420544 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 8420544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (13533120).

8420544 is an abundant number, since it is smaller than the sum of its proper divisors (18645696).

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

8420544 is a wasteful number, since it uses less digits than its factorization.

8420544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 475 (or 459 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

The square root of 8420544 is about 2901.8173615857. The cubic root of 8420544 is about 203.4448574501. Note that the first 3 decimals are identical.

The spelling of 8420544 in words is "eight million, four hundred twenty thousand, five hundred forty-four".