64402443 has 24 divisors (see below), whose sum is σ = 112570848. Its totient is φ = 34636032.

The previous prime is 64402427. The next prime is 64402463. The reversal of 64402443 is 34420446.

It is not a de Polignac number, because 64402443 - 2⁴ = 64402427 is a prime.

It is not an unprimeable number, because it can be changed into a prime (64402463) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 28996 + ... + 31137.

It is an arithmetic number, because the mean of its divisors is an integer number (4690452).

Almost surely, 2^64402443 is an apocalyptic number.

64402443 is a gapful number since it is divisible by the number (63) formed by its first and last digit.

64402443 is a deficient number, since it is larger than the sum of its proper divisors (48168405).

64402443 is a wasteful number, since it uses less digits than its factorization.

64402443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60163 (or 60160 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 27.

The square root of 64402443 is about 8025.1132702287. The cubic root of 64402443 is about 400.8366716479.

Adding to 64402443 its reverse (34420446), we get a palindrome (98822889).

The spelling of 64402443 in words is "sixty-four million, four hundred two thousand, four hundred forty-three".