33530420 has 48 divisors (see below), whose sum is σ = 87792768. Its totient is φ = 10450560.

The previous prime is 33530407. The next prime is 33530447. The reversal of 33530420 is 2403533.

It is a super-2 number, since 2×33530420² = 2248578130752800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 33530392 and 33530401.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9347 + ... + 12426.

It is an arithmetic number, because the mean of its divisors is an integer number (1829016).

Almost surely, 2^33530420 is an apocalyptic number.

It is an amenable number.

33530420 is an abundant number, since it is smaller than the sum of its proper divisors (54262348).

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

33530420 is a wasteful number, since it uses less digits than its factorization.

33530420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21800 (or 21798 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 33530420 is about 5790.5457428467. The cubic root of 33530420 is about 322.4628324853.

Adding to 33530420 its reverse (2403533), we get a palindrome (35933953).

The spelling of 33530420 in words is "thirty-three million, five hundred thirty thousand, four hundred twenty".