6406544 has 10 divisors (see below), whose sum is σ = 12412710. Its totient is φ = 3203264.

The previous prime is 6406529. The next prime is 6406549. The reversal of 6406544 is 4456046.

It can be written as a sum of positive squares in only one way, i.e., 5382400 + 1024144 = 2320^2 + 1012^2 .

It is not an unprimeable number, because it can be changed into a prime (6406549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 200189 + ... + 200220.

It is an arithmetic number, because the mean of its divisors is an integer number (1241271).

Almost surely, 2^6406544 is an apocalyptic number.

It is an amenable number.

6406544 is a deficient number, since it is larger than the sum of its proper divisors (6006166).

6406544 is a wasteful number, since it uses less digits than its factorization.

6406544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 400417 (or 400411 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The square root of 6406544 is about 2531.1151692485. The cubic root of 6406544 is about 185.7268121165.

The spelling of 6406544 in words is "six million, four hundred six thousand, five hundred forty-four".