36638481 has 32 divisors (see below), whose sum is σ = 55070208. Its totient is φ = 21479040.

The previous prime is 36638447. The next prime is 36638509. The reversal of 36638481 is 18483663.

It is not a de Polignac number, because 36638481 - 2⁷ = 36638353 is a prime.

It is a super-2 number, since 2×36638481² = 2684756579974722, which contains 22 as substring.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (36638401) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 161290 + ... + 161516.

It is an arithmetic number, because the mean of its divisors is an integer number (1720944).

Almost surely, 2^36638481 is an apocalyptic number.

It is an amenable number.

36638481 is a deficient number, since it is larger than the sum of its proper divisors (18431727).

36638481 is a wasteful number, since it uses less digits than its factorization.

36638481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 381.

The product of its digits is 82944, while the sum is 39.

The square root of 36638481 is about 6052.9729059364. The cubic root of 36638481 is about 332.1333505298.

The spelling of 36638481 in words is "thirty-six million, six hundred thirty-eight thousand, four hundred eighty-one".