33780036 has 12 divisors (see below), whose sum is σ = 78820112. Its totient is φ = 11260008.

The previous prime is 33780013. The next prime is 33780067. The reversal of 33780036 is 63008733.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×33780036² = 2282181664322592, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33779985 and 33780012.

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, 1407490 + ... + 1407513.

Almost surely, 2^33780036 is an apocalyptic number.

It is an amenable number.

33780036 is an abundant number, since it is smaller than the sum of its proper divisors (45040076).

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

33780036 is a wasteful number, since it uses less digits than its factorization.

33780036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2815010 (or 2815008 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 30.

The square root of 33780036 is about 5812.0595316979. The cubic root of 33780036 is about 323.2610426356.

Adding to 33780036 its reverse (63008733), we get a palindrome (96788769).

The spelling of 33780036 in words is "thirty-three million, seven hundred eighty thousand, thirty-six".