33421040 has 20 divisors (see below), whose sum is σ = 77704104. Its totient is φ = 13368384.

The previous prime is 33420991. The next prime is 33421067. The reversal of 33421040 is 4012433.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×33421040² = 2233931829363200, which contains 22 as substring.

It is a congruent number.

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, 208802 + ... + 208961.

Almost surely, 2^33421040 is an apocalyptic number.

It is an amenable number.

33421040 is an abundant number, since it is smaller than the sum of its proper divisors (44283064).

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

33421040 is a wasteful number, since it uses less digits than its factorization.

33421040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417776 (or 417770 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 33421040 is about 5781.0933222013. The cubic root of 33421040 is about 322.1118138490. Note that the first 3 decimals are identical.

Adding to 33421040 its reverse (4012433), we get a palindrome (37433473).

The spelling of 33421040 in words is "thirty-three million, four hundred twenty-one thousand, forty".