36128421 has 48 divisors (see below), whose sum is σ = 62270208. Its totient is φ = 19756800.

The previous prime is 36128419. The next prime is 36128429. The reversal of 36128421 is 12482163.

36128421 is a `hidden beast` number, since 3 + 612 + 8 + 42 + 1 = 666.

It is not a de Polignac number, because 36128421 - 2¹ = 36128419 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36128429) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 183295 + ... + 183491.

It is an arithmetic number, because the mean of its divisors is an integer number (1297296).

Almost surely, 2^36128421 is an apocalyptic number.

It is an amenable number.

36128421 is a deficient number, since it is larger than the sum of its proper divisors (26141787).

36128421 is a wasteful number, since it uses less digits than its factorization.

36128421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 322 (or 319 counting only the distinct ones).

The product of its digits is 2304, while the sum is 27.

The square root of 36128421 is about 6010.6922230306. The cubic root of 36128421 is about 330.5848856126.

It can be divided in two parts, 361 and 28421, that added together give a palindrome (28782).

The spelling of 36128421 in words is "thirty-six million, one hundred twenty-eight thousand, four hundred twenty-one".