64729442 has 6 divisors (see below), whose sum is σ = 97111233. Its totient is φ = 32359032.

The previous prime is 64729439. The next prime is 64729463. The reversal of 64729442 is 24492746.

It can be written as a sum of positive squares in 2 ways, for example, as 45711121 + 19018321 = 6761^2 + 4361^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=5689.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64729396 and 64729405.

It is an unprimeable number.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 8534 + ... + 14222.

Almost surely, 2^64729442 is an apocalyptic number.

64729442 is a deficient number, since it is larger than the sum of its proper divisors (32381791).

64729442 is an frugal number, since it uses more digits than its factorization.

64729442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11380 (or 5691 counting only the distinct ones).

The product of its digits is 96768, while the sum is 38.

The square root of 64729442 is about 8045.4609563405. The cubic root of 64729442 is about 401.5139336168.

The spelling of 64729442 in words is "sixty-four million, seven hundred twenty-nine thousand, four hundred forty-two".