33913890 has 80 divisors (see below), whose sum is σ = 92129400. Its totient is φ = 8951040.

The previous prime is 33913889. The next prime is 33913921. The reversal of 33913890 is 9831933.

It can be written as a sum of positive squares in 4 ways, for example, as 23357889 + 10556001 = 4833^2 + 3249^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 120550 + ... + 120830.

Almost surely, 2^33913890 is an apocalyptic number.

33913890 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 33913890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46064700).

33913890 is an abundant number, since it is smaller than the sum of its proper divisors (58215510).

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

33913890 is a wasteful number, since it uses less digits than its factorization.

33913890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 449 (or 440 counting only the distinct ones).

The product of its (nonzero) digits is 17496, while the sum is 36.

The square root of 33913890 is about 5823.5633421471. The cubic root of 33913890 is about 323.6874558052.

The spelling of 33913890 in words is "thirty-three million, nine hundred thirteen thousand, eight hundred ninety".