64439496 has 128 divisors (see below), whose sum is σ = 200822400. Its totient is φ = 18973440.

The previous prime is 64439489. The next prime is 64439519. The reversal of 64439496 is 69493446.

It is a happy number.

64439496 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-5 number, since 5×64439496⁵ (a number of 40 digits) contains 55555 as substring.

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 87546 + ... + 88278.

It is an arithmetic number, because the mean of its divisors is an integer number (1568925).

Almost surely, 2^64439496 is an apocalyptic number.

64439496 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64439496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (100411200).

64439496 is an abundant number, since it is smaller than the sum of its proper divisors (136382904).

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

64439496 is a wasteful number, since it uses less digits than its factorization.

64439496 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 796 (or 786 counting only the distinct ones).

The product of its digits is 559872, while the sum is 45.

The square root of 64439496 is about 8027.4215038205. The cubic root of 64439496 is about 400.9135287415.

The spelling of 64439496 in words is "sixty-four million, four hundred thirty-nine thousand, four hundred ninety-six".