33997640 has 32 divisors (see below), whose sum is σ = 77578560. Its totient is φ = 13406400.

The previous prime is 33997619. The next prime is 33997661. The reversal of 33997640 is 4679933.

It is an interprime number because it is at equal distance from previous prime (33997619) and next prime (33997661).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3146 + ... + 8825.

It is an arithmetic number, because the mean of its divisors is an integer number (2424330).

Almost surely, 2^33997640 is an apocalyptic number.

It is an amenable number.

33997640 is an abundant number, since it is smaller than the sum of its proper divisors (43580920).

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

33997640 is a wasteful number, since it uses less digits than its factorization.

33997640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12053 (or 12049 counting only the distinct ones).

The product of its (nonzero) digits is 122472, while the sum is 41.

The square root of 33997640 is about 5830.7495230030. The cubic root of 33997640 is about 323.9536843819.

It can be divided in two parts, 339 and 97640, that added together give a palindrome (97979).

The spelling of 33997640 in words is "thirty-three million, nine hundred ninety-seven thousand, six hundred forty".