6440454 has 48 divisors (see below), whose sum is σ = 14640912. Its totient is φ = 2044224.

The previous prime is 6440453. The next prime is 6440459. The reversal of 6440454 is 4540446.

It is a super-2 number, since 2×6440454² = 82958895452232, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6440453) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 40944 + ... + 41100.

It is an arithmetic number, because the mean of its divisors is an integer number (305019).

Almost surely, 2^6440454 is an apocalyptic number.

6440454 is an abundant number, since it is smaller than the sum of its proper divisors (8200458).

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

6440454 is a wasteful number, since it uses less digits than its factorization.

6440454 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 261 (or 258 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 6440454 is about 2537.8049570446. The cubic root of 6440454 is about 186.0539212381.

The spelling of 6440454 in words is "six million, four hundred forty thousand, four hundred fifty-four".