64238506 has 24 divisors (see below), whose sum is σ = 102444804. Its totient is φ = 30205440.

The previous prime is 64238501. The next prime is 64238507. The reversal of 64238506 is 60583246.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 60980481 + 3258025 = 7809^2 + 1805^2 .

It is a super-2 number, since 2×64238506² = 8253171306224072, which contains 22 as substring.

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 11 ways as a sum of consecutive naturals, for example, 139116 + ... + 139576.

Almost surely, 2^64238506 is an apocalyptic number.

64238506 is a deficient number, since it is larger than the sum of its proper divisors (38206298).

64238506 is a wasteful number, since it uses less digits than its factorization.

64238506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 694 (or 675 counting only the distinct ones).

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 64238506 is about 8014.8927628509. The cubic root of 64238506 is about 400.4962715318.

The spelling of 64238506 in words is "sixty-four million, two hundred thirty-eight thousand, five hundred six".