33728438 has 8 divisors (see below), whose sum is σ = 50664432. Its totient is φ = 16840296.

The previous prime is 33728413. The next prime is 33728447. The reversal of 33728438 is 83482733.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×33728438² = 2275215059839688, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 10145 + ... + 13052.

It is an arithmetic number, because the mean of its divisors is an integer number (6333054).

Almost surely, 2^33728438 is an apocalyptic number.

33728438 is a deficient number, since it is larger than the sum of its proper divisors (16935994).

33728438 is a wasteful number, since it uses less digits than its factorization.

33728438 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23926.

The product of its digits is 96768, while the sum is 38.

The square root of 33728438 is about 5807.6189613300. The cubic root of 33728438 is about 323.0963682203.

The spelling of 33728438 in words is "thirty-three million, seven hundred twenty-eight thousand, four hundred thirty-eight".