64404402 has 8 divisors (see below), whose sum is σ = 128808816. Its totient is φ = 21468132.

The previous prime is 64404371. The next prime is 64404413. The reversal of 64404402 is 20440446.

It is a sphenic number, since it is the product of 3 distinct primes.

64404402 is an admirable number.

It is a super-3 number, since 3×64404402³ (a number of 24 digits) contains 333 as substring.

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 3 ways as a sum of consecutive naturals, for example, 5367028 + ... + 5367039.

It is an arithmetic number, because the mean of its divisors is an integer number (16101102).

Almost surely, 2^64404402 is an apocalyptic number.

64404402 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64404402 is a wasteful number, since it uses less digits than its factorization.

64404402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10734072.

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 64404402 is about 8025.2353236525. The cubic root of 64404402 is about 400.8407358368.

Adding to 64404402 its reverse (20440446), we get a palindrome (84844848).

The spelling of 64404402 in words is "sixty-four million, four hundred four thousand, four hundred two".