64239936 has 112 divisors (see below), whose sum is σ = 180246528. Its totient is φ = 20160000.

The previous prime is 64239919. The next prime is 64239937. The reversal of 64239936 is 63993246.

64239936 = T₁₇₃ + T₁₇₄ + ... + T₇₃₀.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64239937) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 255811 + ... + 256061.

It is an arithmetic number, because the mean of its divisors is an integer number (1609344).

Almost surely, 2^64239936 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64239936, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90123264).

64239936 is an abundant number, since it is smaller than the sum of its proper divisors (116006592).

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

64239936 is a wasteful number, since it uses less digits than its factorization.

64239936 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340 (or 330 counting only the distinct ones).

The product of its digits is 209952, while the sum is 42.

The square root of 64239936 is about 8014.9819712835. The cubic root of 64239936 is about 400.4992432978.

The spelling of 64239936 in words is "sixty-four million, two hundred thirty-nine thousand, nine hundred thirty-six".