6447090 has 64 divisors (see below), whose sum is σ = 16998912. Its totient is φ = 1555200.

The previous prime is 6447073. The next prime is 6447109. The reversal of 6447090 is 907446.

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 23655 + ... + 23925.

It is an arithmetic number, because the mean of its divisors is an integer number (265608).

Almost surely, 2^6447090 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 6447090, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (8499456).

6447090 is an abundant number, since it is smaller than the sum of its proper divisors (10551822).

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

6447090 is a wasteful number, since it uses less digits than its factorization.

6447090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 6447090 is about 2539.1120495165. The cubic root of 6447090 is about 186.1178002761.

The spelling of 6447090 in words is "six million, four hundred forty-seven thousand, ninety".