6428899 has 4 divisors (see below), whose sum is σ = 6435360. Its totient is φ = 6422440.

The previous prime is 6428879. The next prime is 6428921. The reversal of 6428899 is 9988246.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 9988246 = 2 ⋅4994123.

It is a cyclic number.

It is not a de Polignac number, because 6428899 - 2¹¹ = 6426851 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (6428809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1387 + ... + 3844.

It is an arithmetic number, because the mean of its divisors is an integer number (1608840).

Almost surely, 2^6428899 is an apocalyptic number.

6428899 is a deficient number, since it is larger than the sum of its proper divisors (6461).

6428899 is a wasteful number, since it uses less digits than its factorization.

6428899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6460.

The product of its digits is 248832, while the sum is 46.

The square root of 6428899 is about 2535.5273613195. The cubic root of 6428899 is about 185.9425864343.

The spelling of 6428899 in words is "six million, four hundred twenty-eight thousand, eight hundred ninety-nine".