6428549 has 4 divisors (see below), whose sum is σ = 6492300. Its totient is φ = 6364800.

The previous prime is 6428489. The next prime is 6428551. The reversal of 6428549 is 9458246.

6428549 = T₃₅ + T₃₆ + ... + T₃₃₇.

6428549 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 4072324 + 2356225 = 2018^2 + 1535^2 .

It is a cyclic number.

It is not a de Polignac number, because 6428549 - 2¹⁶ = 6363013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31724 + ... + 31925.

It is an arithmetic number, because the mean of its divisors is an integer number (1623075).

Almost surely, 2^6428549 is an apocalyptic number.

It is an amenable number.

6428549 is a deficient number, since it is larger than the sum of its proper divisors (63751).

6428549 is a wasteful number, since it uses less digits than its factorization.

6428549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63750.

The product of its digits is 69120, while the sum is 38.

The square root of 6428549 is about 2535.4583412078. The cubic root of 6428549 is about 185.9392120314.

The spelling of 6428549 in words is "six million, four hundred twenty-eight thousand, five hundred forty-nine".