64442426 has 4 divisors (see below), whose sum is σ = 96663642. Its totient is φ = 32221212.

The previous prime is 64442401. The next prime is 64442453. The reversal of 64442426 is 62424446.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 45091225 + 19351201 = 6715^2 + 4399^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64442392 and 64442401.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16110605 + ... + 16110608.

Almost surely, 2^64442426 is an apocalyptic number.

64442426 is a deficient number, since it is larger than the sum of its proper divisors (32221216).

64442426 is a wasteful number, since it uses less digits than its factorization.

64442426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32221215.

The product of its digits is 36864, while the sum is 32.

The square root of 64442426 is about 8027.6040011949. The cubic root of 64442426 is about 400.9196050296.

The spelling of 64442426 in words is "sixty-four million, four hundred forty-two thousand, four hundred twenty-six".