6440274 has 12 divisors (see below), whose sum is σ = 13953966. Its totient is φ = 2146752.

The previous prime is 6440249. The next prime is 6440303. The reversal of 6440274 is 4720446.

It can be written as a sum of positive squares in only one way, i.e., 5489649 + 950625 = 2343^2 + 975^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 178879 + ... + 178914.

Almost surely, 2^6440274 is an apocalyptic number.

6440274 is an abundant number, since it is smaller than the sum of its proper divisors (7513692).

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

6440274 is a wasteful number, since it uses less digits than its factorization.

6440274 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357801 (or 357798 counting only the distinct ones).

The product of its (nonzero) digits is 5376, while the sum is 27.

The square root of 6440274 is about 2537.7694930785. The cubic root of 6440274 is about 186.0521879225.

The spelling of 6440274 in words is "six million, four hundred forty thousand, two hundred seventy-four".