33720683440 has 40 divisors (see below), whose sum is σ = 78500355120. Its totient is φ = 13471109376.

The previous prime is 33720683419. The next prime is 33720683449. The reversal of 33720683440 is 4438602733.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×33720683440² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 33720683393 and 33720683402.

It is not an unprimeable number, because it can be changed into a prime (33720683449) 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, 204835 + ... + 330754.

It is an arithmetic number, because the mean of its divisors is an integer number (1962508878).

Almost surely, 2^33720683440 is an apocalyptic number.

It is an amenable number.

33720683440 is an abundant number, since it is smaller than the sum of its proper divisors (44779671680).

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

33720683440 is a wasteful number, since it uses less digits than its factorization.

33720683440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 536389 (or 536383 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 40.

The spelling of 33720683440 in words is "thirty-three billion, seven hundred twenty million, six hundred eighty-three thousand, four hundred forty".