64401336 has 96 divisors (see below), whose sum is σ = 185328000. Its totient is φ = 20146752.

The previous prime is 64401301. The next prime is 64401343. The reversal of 64401336 is 63310446.

64401336 is a `hidden beast` number, since 644 + 0 + 13 + 3 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 244741 + ... + 245003.

It is an arithmetic number, because the mean of its divisors is an integer number (1930500).

Almost surely, 2^64401336 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 64401336, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (92664000).

64401336 is an abundant number, since it is smaller than the sum of its proper divisors (120926664).

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

64401336 is a wasteful number, since it uses less digits than its factorization.

64401336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 473 (or 466 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 64401336 is about 8025.0442989432. The cubic root of 64401336 is about 400.8343750024.

It can be divided in two parts, 6440 and 1336, that added together give a 5-th power (7776 = 6⁵).

The spelling of 64401336 in words is "sixty-four million, four hundred one thousand, three hundred thirty-six".