33381904 has 20 divisors (see below), whose sum is σ = 65274220. Its totient is φ = 16536960.

The previous prime is 33381899. The next prime is 33381949. The reversal of 33381904 is 40918333.

It can be written as a sum of positive squares in 2 ways, for example, as 20793600 + 12588304 = 4560^2 + 3548^2 .

It is a super-2 number, since 2×33381904² = 2228703029330432, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7827 + ... + 11314.

It is an arithmetic number, because the mean of its divisors is an integer number (3263711).

Almost surely, 2^33381904 is an apocalyptic number.

It is an amenable number.

33381904 is a deficient number, since it is larger than the sum of its proper divisors (31892316).

33381904 is a wasteful number, since it uses less digits than its factorization.

33381904 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19258 (or 19252 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 31.

The square root of 33381904 is about 5777.7075038461. The cubic root of 33381904 is about 321.9860338837.

The spelling of 33381904 in words is "thirty-three million, three hundred eighty-one thousand, nine hundred four".