64238538 has 64 divisors (see below), whose sum is σ = 163618560. Its totient is φ = 16353792.

The previous prime is 64238507. The next prime is 64238543. The reversal of 64238538 is 83583246.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a house number.

It is a junction number, because it is equal to n+sod(n) for n = 64238496 and 64238505.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13806 + ... + 17862.

It is an arithmetic number, because the mean of its divisors is an integer number (2556540).

Almost surely, 2^64238538 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64238538, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81809280).

64238538 is an abundant number, since it is smaller than the sum of its proper divisors (99380022).

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

64238538 is a wasteful number, since it uses less digits than its factorization.

64238538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4111.

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

The square root of 64238538 is about 8014.8947591344. The cubic root of 64238538 is about 400.4963380333.

The spelling of 64238538 in words is "sixty-four million, two hundred thirty-eight thousand, five hundred thirty-eight".