6428550 has 48 divisors (see below), whose sum is σ = 16887312. Its totient is φ = 1612800.

The previous prime is 6428489. The next prime is 6428551. The reversal of 6428550 is 558246.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6428551) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1290 + ... + 3810.

It is an arithmetic number, because the mean of its divisors is an integer number (351819).

Almost surely, 2^6428550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6428550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8443656).

6428550 is an abundant number, since it is smaller than the sum of its proper divisors (10458762).

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

6428550 is a wasteful number, since it uses less digits than its factorization.

6428550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2553 (or 2548 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

The square root of 6428550 is about 2535.4585384108. The cubic root of 6428550 is about 185.9392216727.

The spelling of 6428550 in words is "six million, four hundred twenty-eight thousand, five hundred fifty".