33500420 has 48 divisors (see below), whose sum is σ = 77293440. Its totient is φ = 12139776.

The previous prime is 33500419. The next prime is 33500437. The reversal of 33500420 is 2400533.

It is a super-2 number, since 2×33500420² = 2244556280352800, 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 15 ways as a sum of consecutive naturals, for example, 6824 + ... + 10656.

It is an arithmetic number, because the mean of its divisors is an integer number (1610280).

Almost surely, 2^33500420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33500420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38646720).

33500420 is an abundant number, since it is smaller than the sum of its proper divisors (43793020).

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

33500420 is a wasteful number, since it uses less digits than its factorization.

33500420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3884 (or 3882 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 17.

The square root of 33500420 is about 5787.9547337553. The cubic root of 33500420 is about 322.3666335559.

Adding to 33500420 its reverse (2400533), we get a palindrome (35900953).

The spelling of 33500420 in words is "thirty-three million, five hundred thousand, four hundred twenty".