33750040 has 32 divisors (see below), whose sum is σ = 76340880. Its totient is φ = 13428352.

The previous prime is 33750037. The next prime is 33750043. The reversal of 33750040 is 4005733.

It is an interprime number because it is at equal distance from previous prime (33750037) and next prime (33750043).

It is a super-2 number, since 2×33750040² = 2278130400003200, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33749993 and 33750020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33750043) 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, 5739 + ... + 10021.

Almost surely, 2^33750040 is an apocalyptic number.

It is an amenable number.

33750040 is an abundant number, since it is smaller than the sum of its proper divisors (42590840).

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

33750040 is a wasteful number, since it uses less digits than its factorization.

33750040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4491 (or 4487 counting only the distinct ones).

The product of its (nonzero) digits is 1260, while the sum is 22.

The square root of 33750040 is about 5809.4784619620. The cubic root of 33750040 is about 323.1653311749.

Adding to 33750040 its reverse (4005733), we get a palindrome (37755773).

The spelling of 33750040 in words is "thirty-three million, seven hundred fifty thousand, forty".