36440421 has 4 divisors (see below), whose sum is σ = 48587232. Its totient is φ = 24293612.

The previous prime is 36440413. The next prime is 36440489. The reversal of 36440421 is 12404463.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 36440421 - 2³ = 36440413 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 36440391 and 36440400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36440321) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6073401 + ... + 6073406.

It is an arithmetic number, because the mean of its divisors is an integer number (12146808).

Almost surely, 2^36440421 is an apocalyptic number.

It is an amenable number.

36440421 is a deficient number, since it is larger than the sum of its proper divisors (12146811).

36440421 is a wasteful number, since it uses less digits than its factorization.

36440421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12146810.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 36440421 is about 6036.5901798946. The cubic root of 36440421 is about 331.5337876106.

Adding to 36440421 its reverse (12404463), we get a palindrome (48844884).

The spelling of 36440421 in words is "thirty-six million, four hundred forty thousand, four hundred twenty-one".