64538238 has 16 divisors (see below), whose sum is σ = 131823360. Its totient is φ = 21054936.

The previous prime is 64538237. The next prime is 64538263. The reversal of 64538238 is 83283546.

It is a junction number, because it is equal to n+sod(n) for n = 64538196 and 64538205.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64538237) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 114148 + ... + 114711.

It is an arithmetic number, because the mean of its divisors is an integer number (8238960).

Almost surely, 2^64538238 is an apocalyptic number.

64538238 is an abundant number, since it is smaller than the sum of its proper divisors (67285122).

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

64538238 is a wasteful number, since it uses less digits than its factorization.

64538238 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 228911.

The product of its digits is 138240, while the sum is 39.

The square root of 64538238 is about 8033.5694432799. The cubic root of 64538238 is about 401.1182003239.

It can be divided in two parts, 645 and 38238, that added together give a palindrome (38883).

The spelling of 64538238 in words is "sixty-four million, five hundred thirty-eight thousand, two hundred thirty-eight".