64638027 has 16 divisors (see below), whose sum is σ = 99924480. Its totient is φ = 41218056.

The previous prime is 64637977. The next prime is 64638031. The reversal of 64638027 is 72083646.

64638027 is a `hidden beast` number, since 646 + 3 + 8 + 0 + 2 + 7 = 666.

It is not a de Polignac number, because 64638027 - 2¹⁴ = 64621643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 64637982 and 64638000.

It is not an unprimeable number, because it can be changed into a prime (64638127) 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, 51423 + ... + 52664.

It is an arithmetic number, because the mean of its divisors is an integer number (6245280).

Almost surely, 2^64638027 is an apocalyptic number.

64638027 is a deficient number, since it is larger than the sum of its proper divisors (35286453).

64638027 is a wasteful number, since it uses less digits than its factorization.

64638027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 104119 (or 104113 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 36.

The square root of 64638027 is about 8039.7777954369. Note that the first 4 decimals coincide. The cubic root of 64638027 is about 401.3248301351.

The spelling of 64638027 in words is "sixty-four million, six hundred thirty-eight thousand, twenty-seven".