33481890 has 64 divisors (see below), whose sum is σ = 96163200. Its totient is φ = 8240832.

The previous prime is 33481883. The next prime is 33481909. The reversal of 33481890 is 9818433.

It is a super-2 number, since 2×33481890² = 2242073915944200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1260 + ... + 8279.

It is an arithmetic number, because the mean of its divisors is an integer number (1502550).

Almost surely, 2^33481890 is an apocalyptic number.

33481890 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 33481890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (48081600).

33481890 is an abundant number, since it is smaller than the sum of its proper divisors (62681310).

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

33481890 is a wasteful number, since it uses less digits than its factorization.

33481890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9568 (or 9562 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 36.

The square root of 33481890 is about 5786.3537741828. The cubic root of 33481890 is about 322.3071859886.

The spelling of 33481890 in words is "thirty-three million, four hundred eighty-one thousand, eight hundred ninety".