33144040 has 16 divisors (see below), whose sum is σ = 74574180. Its totient is φ = 13257600.

The previous prime is 33144019. The next prime is 33144073. The reversal of 33144040 is 4044133.

It can be written as a sum of positive squares in 2 ways, for example, as 30935844 + 2208196 = 5562^2 + 1486^2 .

It is a junction number, because it is equal to n+sod(n) for n = 33143999 and 33144017.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 414261 + ... + 414340.

Almost surely, 2^33144040 is an apocalyptic number.

It is an amenable number.

33144040 is an abundant number, since it is smaller than the sum of its proper divisors (41430140).

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

33144040 is a wasteful number, since it uses less digits than its factorization.

33144040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 828612 (or 828608 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 19.

The square root of 33144040 is about 5757.0860684899. The cubic root of 33144040 is about 321.2194356908.

Adding to 33144040 its reverse (4044133), we get a palindrome (37188173).

The spelling of 33144040 in words is "thirty-three million, one hundred forty-four thousand, forty".