64404450 has 96 divisors (see below), whose sum is σ = 193648320. Its totient is φ = 15609600.

The previous prime is 64404421. The next prime is 64404479. The reversal of 64404450 is 5440446.

It is an interprime number because it is at equal distance from previous prime (64404421) and next prime (64404479).

It is a Harshad number since it is a multiple of its sum of digits (27).

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 47 ways as a sum of consecutive naturals, for example, 12682 + ... + 17018.

It is an arithmetic number, because the mean of its divisors is an integer number (2017170).

Almost surely, 2^64404450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64404450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96824160).

64404450 is an abundant number, since it is smaller than the sum of its proper divisors (129243870).

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

64404450 is a wasteful number, since it uses less digits than its factorization.

64404450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4369 (or 4358 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 27.

The square root of 64404450 is about 8025.2383142185. The cubic root of 64404450 is about 400.8408354177.

Adding to 64404450 its reverse (5440446), we get a palindrome (69844896).

The spelling of 64404450 in words is "sixty-four million, four hundred four thousand, four hundred fifty".