36551440 has 80 divisors (see below), whose sum is σ = 90619200. Its totient is φ = 13671936.

The previous prime is 36551407. The next prime is 36551441. The reversal of 36551440 is 4415563.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 36551399 and 36551408.

It is not an unprimeable number, because it can be changed into a prime (36551441) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 211194 + ... + 211366.

It is an arithmetic number, because the mean of its divisors is an integer number (1132740).

Almost surely, 2^36551440 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 36551440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (45309600).

36551440 is an abundant number, since it is smaller than the sum of its proper divisors (54067760).

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

36551440 is a wasteful number, since it uses less digits than its factorization.

36551440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344 (or 338 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 28.

The square root of 36551440 is about 6045.7786926086. The cubic root of 36551440 is about 331.8701287170.

The spelling of 36551440 in words is "thirty-six million, five hundred fifty-one thousand, four hundred forty".