64728467 has 4 divisors (see below), whose sum is σ = 64825320. Its totient is φ = 64631616.

The previous prime is 64728449. The next prime is 64728479. The reversal of 64728467 is 76482746.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 76482746 = 2 ⋅38241373.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-64728467 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (64728407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47417 + ... + 48762.

It is an arithmetic number, because the mean of its divisors is an integer number (16206330).

Almost surely, 2^64728467 is an apocalyptic number.

64728467 is a deficient number, since it is larger than the sum of its proper divisors (96853).

64728467 is an equidigital number, since it uses as much as digits as its factorization.

64728467 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96852.

The product of its digits is 451584, while the sum is 44.

The square root of 64728467 is about 8045.4003629403. The cubic root of 64728467 is about 401.5119176457.

The spelling of 64728467 in words is "sixty-four million, seven hundred twenty-eight thousand, four hundred sixty-seven".