64402432 has 44 divisors (see below), whose sum is σ = 130148260. Its totient is φ = 31850496.

The previous prime is 64402427. The next prime is 64402463. The reversal of 64402432 is 23420446.

It can be written as a sum of positive squares in 2 ways, for example, as 57517056 + 6885376 = 7584^2 + 2624^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64402397 and 64402406.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 111328 + ... + 111904.

It is an arithmetic number, because the mean of its divisors is an integer number (2957915).

Almost surely, 2^64402432 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 64402432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65074130).

64402432 is an abundant number, since it is smaller than the sum of its proper divisors (65745828).

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

64402432 is a wasteful number, since it uses less digits than its factorization.

64402432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 706 (or 688 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 25.

The square root of 64402432 is about 8025.1125848800. The cubic root of 64402432 is about 400.8366488268.

Adding to 64402432 its reverse (23420446), we get a palindrome (87822878).

The spelling of 64402432 in words is "sixty-four million, four hundred two thousand, four hundred thirty-two".