33528390 has 128 divisors (see below), whose sum is σ = 97320960. Its totient is φ = 7233408.

The previous prime is 33528377. The next prime is 33528463. The reversal of 33528390 is 9382533.

It is a super-2 number, since 2×33528390² = 2248305871984200, 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 63 ways as a sum of consecutive naturals, for example, 424371 + ... + 424449.

It is an arithmetic number, because the mean of its divisors is an integer number (760320).

Almost surely, 2^33528390 is an apocalyptic number.

33528390 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 33528390, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48660480).

33528390 is an abundant number, since it is smaller than the sum of its proper divisors (63792570).

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

33528390 is a wasteful number, since it uses less digits than its factorization.

33528390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 186.

The product of its (nonzero) digits is 19440, while the sum is 33.

The square root of 33528390 is about 5790.3704544701. The cubic root of 33528390 is about 322.4563248348.

The spelling of 33528390 in words is "thirty-three million, five hundred twenty-eight thousand, three hundred ninety".