4006544 has 10 divisors (see below), whose sum is σ = 7762710. Its totient is φ = 2003264.

The previous prime is 4006537. The next prime is 4006547. The reversal of 4006544 is 4456004.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 3385600 + 620944 = 1840^2 + 788^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4006547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 125189 + ... + 125220.

It is an arithmetic number, because the mean of its divisors is an integer number (776271).

Almost surely, 2^4006544 is an apocalyptic number.

It is an amenable number.

4006544 is a deficient number, since it is larger than the sum of its proper divisors (3756166).

4006544 is a wasteful number, since it uses less digits than its factorization.

4006544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250417 (or 250411 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

The square root of 4006544 is about 2001.6353314228. The cubic root of 4006544 is about 158.8266243029.

The spelling of 4006544 in words is "four million, six thousand, five hundred forty-four".