64044405 has 32 divisors (see below), whose sum is σ = 116017920. Its totient is φ = 33508800.

The previous prime is 64044391. The next prime is 64044413. The reversal of 64044405 is 50444046.

It is not a de Polignac number, because 64044405 - 2¹¹ = 64042357 is a prime.

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

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2680 + ... + 11630.

It is an arithmetic number, because the mean of its divisors is an integer number (3625560).

Almost surely, 2^64044405 is an apocalyptic number.

It is an amenable number.

64044405 is a deficient number, since it is larger than the sum of its proper divisors (51973515).

64044405 is a wasteful number, since it uses less digits than its factorization.

64044405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9018 (or 9012 counting only the distinct ones).

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

The square root of 64044405 is about 8002.7748312695. The cubic root of 64044405 is about 400.0924890295.

The spelling of 64044405 in words is "sixty-four million, forty-four thousand, four hundred five".