33140644 has 12 divisors (see below), whose sum is σ = 58196124. Its totient is φ = 16513184.

The previous prime is 33140623. The next prime is 33140647. The reversal of 33140644 is 44604133.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23406244 + 9734400 = 4838^2 + 3120^2 .

It is not an unprimeable number, because it can be changed into a prime (33140647) 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, 12967 + ... + 15310.

It is an arithmetic number, because the mean of its divisors is an integer number (4849677).

Almost surely, 2^33140644 is an apocalyptic number.

It is an amenable number.

33140644 is a deficient number, since it is larger than the sum of its proper divisors (25055480).

33140644 is a wasteful number, since it uses less digits than its factorization.

33140644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28574 (or 28572 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 33140644 is about 5756.7911200599. The cubic root of 33140644 is about 321.2084644024.

Adding to 33140644 its reverse (44604133), we get a palindrome (77744777).

The spelling of 33140644 in words is "thirty-three million, one hundred forty thousand, six hundred forty-four".