64444233 has 16 divisors (see below), whose sum is σ = 98855936. Its totient is φ = 36579600.

The previous prime is 64444231. The next prime is 64444267. The reversal of 64444233 is 33244446.

It is not a de Polignac number, because 64444233 - 2¹ = 64444231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 64444233.

It is not an unprimeable number, because it can be changed into a prime (64444231) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6991 + ... + 13332.

It is an arithmetic number, because the mean of its divisors is an integer number (6178496).

Almost surely, 2^64444233 is an apocalyptic number.

It is an amenable number.

64444233 is a deficient number, since it is larger than the sum of its proper divisors (34411703).

64444233 is a wasteful number, since it uses less digits than its factorization.

64444233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20484.

The product of its digits is 27648, while the sum is 30.

The square root of 64444233 is about 8027.7165495550. The cubic root of 64444233 is about 400.9233523278.

Adding to 64444233 its reverse (33244446), we get a palindrome (97688679).

The spelling of 64444233 in words is "sixty-four million, four hundred forty-four thousand, two hundred thirty-three".