33730438 has 32 divisors (see below), whose sum is σ = 59424768. Its totient is φ = 14061600.

The previous prime is 33730429. The next prime is 33730439. The reversal of 33730438 is 83403733.

It is a super-2 number, since 2×33730438² = 2275484895343688, which contains 22 as substring.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33730439) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 108303 + ... + 108613.

It is an arithmetic number, because the mean of its divisors is an integer number (1857024).

Almost surely, 2^33730438 is an apocalyptic number.

33730438 is a deficient number, since it is larger than the sum of its proper divisors (25694330).

33730438 is a wasteful number, since it uses less digits than its factorization.

33730438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 508.

The product of its (nonzero) digits is 18144, while the sum is 31.

The square root of 33730438 is about 5807.7911463826. The cubic root of 33730438 is about 323.1027543245.

The spelling of 33730438 in words is "thirty-three million, seven hundred thirty thousand, four hundred thirty-eight".