33400686440 has 64 divisors (see below), whose sum is σ = 82111700160. Its totient is φ = 12126712320.

The previous prime is 33400686419. The next prime is 33400686463. The reversal of 33400686440 is 4468600433.

It is a super-2 number, since 2×33400686440² (a number of 22 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 33400686394 and 33400686403.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 223892 + ... + 341948.

It is an arithmetic number, because the mean of its divisors is an integer number (1282995315).

Almost surely, 2^33400686440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 33400686440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41055850080).

33400686440 is an abundant number, since it is smaller than the sum of its proper divisors (48711013720).

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

33400686440 is a wasteful number, since it uses less digits than its factorization.

33400686440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118722 (or 118718 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 38.

The spelling of 33400686440 in words is "thirty-three billion, four hundred million, six hundred eighty-six thousand, four hundred forty".