40402444 has 12 divisors (see below), whose sum is σ = 73778544. Its totient is φ = 19322864.

The previous prime is 40402441. The next prime is 40402447. The reversal of 40402444 is 44420404.

It is an interprime number because it is at equal distance from previous prime (40402441) and next prime (40402447).

It is not an unprimeable number, because it can be changed into a prime (40402441) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 219487 + ... + 219670.

It is an arithmetic number, because the mean of its divisors is an integer number (6148212).

Almost surely, 2^40402444 is an apocalyptic number.

It is an amenable number.

40402444 is a deficient number, since it is larger than the sum of its proper divisors (33376100).

40402444 is a wasteful number, since it uses less digits than its factorization.

40402444 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 439184 (or 439182 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

The square root of 40402444 is about 6356.2916861957. The cubic root of 40402444 is about 343.1383134350.

Adding to 40402444 its reverse (44420404), we get a palindrome (84822848).

The spelling of 40402444 in words is "forty million, four hundred two thousand, four hundred forty-four".