33472428 has 48 divisors (see below), whose sum is σ = 85639680. Its totient is φ = 10091200.

The previous prime is 33472427. The next prime is 33472487. The reversal of 33472428 is 82427433.

It is a super-2 number, since 2×33472428² = 2240806872430368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33472423) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31018 + ... + 32078.

It is an arithmetic number, because the mean of its divisors is an integer number (1784160).

Almost surely, 2^33472428 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 33472428, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42819840).

33472428 is an abundant number, since it is smaller than the sum of its proper divisors (52167252).

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

33472428 is a wasteful number, since it uses less digits than its factorization.

33472428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1318 (or 1316 counting only the distinct ones).

The product of its digits is 32256, while the sum is 33.

The square root of 33472428 is about 5785.5361030764. The cubic root of 33472428 is about 322.2768217338.

It can be divided in two parts, 3347 and 2428, that added together give a palindrome (5775).

The spelling of 33472428 in words is "thirty-three million, four hundred seventy-two thousand, four hundred twenty-eight".