64478734 has 4 divisors (see below), whose sum is σ = 96718104. Its totient is φ = 32239366.

The previous prime is 64478731. The next prime is 64478737. The reversal of 64478734 is 43787446.

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

It is an interprime number because it is at equal distance from previous prime (64478731) and next prime (64478737).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64478731) 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 as a sum of consecutive naturals, namely, 16119682 + ... + 16119685.

It is an arithmetic number, because the mean of its divisors is an integer number (24179526).

Almost surely, 2^64478734 is an apocalyptic number.

64478734 is a deficient number, since it is larger than the sum of its proper divisors (32239370).

64478734 is a wasteful number, since it uses less digits than its factorization.

64478734 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32239369.

The product of its digits is 451584, while the sum is 43.

The square root of 64478734 is about 8029.8651296270. The cubic root of 64478734 is about 400.9948859533.

The spelling of 64478734 in words is "sixty-four million, four hundred seventy-eight thousand, seven hundred thirty-four".