40638446 has 4 divisors (see below), whose sum is σ = 60957672. Its totient is φ = 20319222.

The previous prime is 40638413. The next prime is 40638463. The reversal of 40638446 is 64483604.

It is a happy number.

It is a semiprime because it is the product of two primes.

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 as a sum of consecutive naturals, namely, 10159610 + ... + 10159613.

It is an arithmetic number, because the mean of its divisors is an integer number (15239418).

Almost surely, 2^40638446 is an apocalyptic number.

40638446 is a deficient number, since it is larger than the sum of its proper divisors (20319226).

40638446 is a wasteful number, since it uses less digits than its factorization.

40638446 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20319225.

The product of its (nonzero) digits is 55296, while the sum is 35.

The square root of 40638446 is about 6374.8290957484. The cubic root of 40638446 is about 343.8051390999.

The spelling of 40638446 in words is "forty million, six hundred thirty-eight thousand, four hundred forty-six".