64238505 has 16 divisors (see below), whose sum is σ = 103593984. Its totient is φ = 33989760.

The previous prime is 64238501. The next prime is 64238507. The reversal of 64238505 is 50583246.

It is not a de Polignac number, because 64238505 - 2² = 64238501 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64238501) 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, 14956 + ... + 18765.

It is an arithmetic number, because the mean of its divisors is an integer number (6474624).

Almost surely, 2^64238505 is an apocalyptic number.

It is an amenable number.

64238505 is a deficient number, since it is larger than the sum of its proper divisors (39355479).

64238505 is a wasteful number, since it uses less digits than its factorization.

64238505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33856.

The product of its (nonzero) digits is 28800, while the sum is 33.

The square root of 64238505 is about 8014.8927004670. The cubic root of 64238505 is about 400.4962694536.

The spelling of 64238505 in words is "sixty-four million, two hundred thirty-eight thousand, five hundred five".