33620028 has 48 divisors (see below), whose sum is σ = 85890336. Its totient is φ = 10172160.

The previous prime is 33620003. The next prime is 33620039. The reversal of 33620028 is 82002633.

It is a super-2 number, since 2×33620028² = 2260612565441568, 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, 7750 + ... + 11282.

It is an arithmetic number, because the mean of its divisors is an integer number (1789382).

Almost surely, 2^33620028 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 33620028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42945168).

33620028 is an abundant number, since it is smaller than the sum of its proper divisors (52270308).

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

33620028 is a wasteful number, since it uses less digits than its factorization.

33620028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3614 (or 3612 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 33620028 is about 5798.2780202401. The cubic root of 33620028 is about 322.7498310514.

The spelling of 33620028 in words is "thirty-three million, six hundred twenty thousand, twenty-eight".