33730040 has 32 divisors (see below), whose sum is σ = 80358480. Its totient is φ = 12698112.

The previous prime is 33730007. The next prime is 33730043. The reversal of 33730040 is 4003733.

It is a super-2 number, since 2×33730040² = 2275431196803200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 33729994 and 33730021.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33730043) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24122 + ... + 25481.

Almost surely, 2^33730040 is an apocalyptic number.

It is an amenable number.

33730040 is an abundant number, since it is smaller than the sum of its proper divisors (46628440).

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

33730040 is a wasteful number, since it uses less digits than its factorization.

33730040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49631 (or 49627 counting only the distinct ones).

The product of its (nonzero) digits is 756, while the sum is 20.

The square root of 33730040 is about 5807.7568819640. The cubic root of 33730040 is about 323.1014835099.

Adding to 33730040 its reverse (4003733), we get a palindrome (37733773).

The spelling of 33730040 in words is "thirty-three million, seven hundred thirty thousand, forty".