40440144 has 40 divisors (see below), whose sum is σ = 110617920. Its totient is φ = 12686848.

The previous prime is 40440131. The next prime is 40440157. The reversal of 40440144 is 44104404.

It is an interprime number because it is at equal distance from previous prime (40440131) and next prime (40440157).

It is a self number, because there is not a number n which added to its sum of digits gives 40440144.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 23964 + ... + 25595.

It is an arithmetic number, because the mean of its divisors is an integer number (2765448).

Almost surely, 2^40440144 is an apocalyptic number.

It is an amenable number.

40440144 is an abundant number, since it is smaller than the sum of its proper divisors (70177776).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40440144 is a wasteful number, since it uses less digits than its factorization.

40440144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49587 (or 49581 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 40440144 is about 6359.2565603221. The cubic root of 40440144 is about 343.2450090665.

Adding to 40440144 its reverse (44104404), we get a palindrome (84544548).

The spelling of 40440144 in words is "forty million, four hundred forty thousand, one hundred forty-four".