40012144 has 10 divisors (see below), whose sum is σ = 77523560. Its totient is φ = 20006064.

The previous prime is 40012139. The next prime is 40012153. The reversal of 40012144 is 44121004.

It is a Harshad number since it is a multiple of its sum of digits (16), and also a Moran number because the ratio is a prime number: 2500759 = 40012144 / (4 + 0 + 0 + 1 + 2 + 1 + 4 + 4).

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, 1250364 + ... + 1250395.

It is an arithmetic number, because the mean of its divisors is an integer number (7752356).

Almost surely, 2^40012144 is an apocalyptic number.

It is an amenable number.

40012144 is a deficient number, since it is larger than the sum of its proper divisors (37511416).

40012144 is a wasteful number, since it uses less digits than its factorization.

40012144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2500767 (or 2500761 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

The square root of 40012144 is about 6325.5153149763. The cubic root of 40012144 is about 342.0297957466.

Adding to 40012144 its reverse (44121004), we get a palindrome (84133148).

It can be divided in two parts, 400 and 12144, that added together give a square (12544 = 112²).

The spelling of 40012144 in words is "forty million, twelve thousand, one hundred forty-four".