33412240 has 40 divisors (see below), whose sum is σ = 78050808. Its totient is φ = 13301760.

The previous prime is 33412219. The next prime is 33412243. The reversal of 33412240 is 4221433.

It can be written as a sum of positive squares in 4 ways, for example, as 5702544 + 27709696 = 2388^2 + 5264^2 .

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×33412240² = 2232755563635200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33412243) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18414 + ... + 20146.

Almost surely, 2^33412240 is an apocalyptic number.

It is an amenable number.

33412240 is an abundant number, since it is smaller than the sum of its proper divisors (44638568).

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

33412240 is a wasteful number, since it uses less digits than its factorization.

33412240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1987 (or 1981 counting only the distinct ones).

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

The square root of 33412240 is about 5780.3321703861. The cubic root of 33412240 is about 322.0835399155.

Adding to 33412240 its reverse (4221433), we get a palindrome (37633673).

The spelling of 33412240 in words is "thirty-three million, four hundred twelve thousand, two hundred forty".