33749140 has 24 divisors (see below), whose sum is σ = 71874432. Its totient is φ = 13308960.

The previous prime is 33749129. The next prime is 33749147. The reversal of 33749140 is 4194733.

It is a super-2 number, since 2×33749140² = 2278008901479200, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33749147) 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, 10464 + ... + 13303.

It is an arithmetic number, because the mean of its divisors is an integer number (2994768).

Almost surely, 2^33749140 is an apocalyptic number.

It is an amenable number.

33749140 is an abundant number, since it is smaller than the sum of its proper divisors (38125292).

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

33749140 is a wasteful number, since it uses less digits than its factorization.

33749140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23847 (or 23845 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 31.

The square root of 33749140 is about 5809.4010018245. The cubic root of 33749140 is about 323.1624585721.

The spelling of 33749140 in words is "thirty-three million, seven hundred forty-nine thousand, one hundred forty".