33897472 has 44 divisors (see below), whose sum is σ = 77458480. Its totient is φ = 14524416.

The previous prime is 33897431. The next prime is 33897503. The reversal of 33897472 is 27479833.

It is a super-2 number, since 2×33897472² = 2298077215981568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4804 + ... + 9532.

It is an arithmetic number, because the mean of its divisors is an integer number (1760420).

Almost surely, 2^33897472 is an apocalyptic number.

33897472 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33897472, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (38729240).

33897472 is an abundant number, since it is smaller than the sum of its proper divisors (43561008).

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

33897472 is an equidigital number, since it uses as much as digits as its factorization.

33897472 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4756 (or 4738 counting only the distinct ones).

The product of its digits is 254016, while the sum is 43.

The square root of 33897472 is about 5822.1535534543. The cubic root of 33897472 is about 323.6352140988.

The spelling of 33897472 in words is "thirty-three million, eight hundred ninety-seven thousand, four hundred seventy-two".