40004445 has 16 divisors (see below), whose sum is σ = 68931072. Its totient is φ = 19694400.

The previous prime is 40004413. The next prime is 40004467. The reversal of 40004445 is 54440004.

It is not a de Polignac number, because 40004445 - 2⁵ = 40004413 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 102381 + ... + 102770.

It is an arithmetic number, because the mean of its divisors is an integer number (4308192).

Almost surely, 2^40004445 is an apocalyptic number.

It is an amenable number.

40004445 is a deficient number, since it is larger than the sum of its proper divisors (28926627).

40004445 is a wasteful number, since it uses less digits than its factorization.

40004445 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 205172.

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 40004445 is about 6324.9067186797. The cubic root of 40004445 is about 342.0078569379.

Adding to 40004445 its reverse (54440004), we get a palindrome (94444449).

The spelling of 40004445 in words is "forty million, four thousand, four hundred forty-five".