6428890 has 32 divisors (see below), whose sum is σ = 13199760. Its totient is φ = 2233344.

The previous prime is 6428879. The next prime is 6428921. The reversal of 6428890 is 988246.

It can be written as a sum of positive squares in 8 ways, for example, as 3775249 + 2653641 = 1943^2 + 1629^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 756 + ... + 3664.

Almost surely, 2^6428890 is an apocalyptic number.

6428890 is an abundant number, since it is smaller than the sum of its proper divisors (6770870).

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

6428890 is a wasteful number, since it uses less digits than its factorization.

6428890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2946.

The product of its (nonzero) digits is 27648, while the sum is 37.

The square root of 6428890 is about 2535.5255865402. The cubic root of 6428890 is about 185.9424996655.

The spelling of 6428890 in words is "six million, four hundred twenty-eight thousand, eight hundred ninety".