36021440 has 112 divisors (see below), whose sum is σ = 105655872. Its totient is φ = 11390976.

The previous prime is 36021437. The next prime is 36021449. The reversal of 36021440 is 4412063.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (112).

It is a Harshad number since it is a multiple of its sum of digits (20).

It is not an unprimeable number, because it can be changed into a prime (36021449) 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, 28502 + ... + 29738.

It is an arithmetic number, because the mean of its divisors is an integer number (943356).

Almost surely, 2^36021440 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 36021440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52827936).

36021440 is an abundant number, since it is smaller than the sum of its proper divisors (69634432).

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

36021440 is a wasteful number, since it uses less digits than its factorization.

36021440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1274 (or 1264 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 36021440 is about 6001.7864007310. The cubic root of 36021440 is about 330.2582612516.

The spelling of 36021440 in words is "thirty-six million, twenty-one thousand, four hundred forty".