33401780 has 12 divisors (see below), whose sum is σ = 70143780. Its totient is φ = 13360704.

The previous prime is 33401779. The next prime is 33401843. The reversal of 33401780 is 8710433.

It can be written as a sum of positive squares in 2 ways, for example, as 14409616 + 18992164 = 3796^2 + 4358^2 .

It is a super-2 number, since 2×33401780² = 2231357814336800, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 835025 + ... + 835064.

It is an arithmetic number, because the mean of its divisors is an integer number (5845315).

Almost surely, 2^33401780 is an apocalyptic number.

It is an amenable number.

33401780 is an abundant number, since it is smaller than the sum of its proper divisors (36742000).

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

33401780 is a wasteful number, since it uses less digits than its factorization.

33401780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1670098 (or 1670096 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 26.

The square root of 33401780 is about 5779.4273072684. The cubic root of 33401780 is about 322.0499260317.

The spelling of 33401780 in words is "thirty-three million, four hundred one thousand, seven hundred eighty".