64473408 has 70 divisors (see below), whose sum is σ = 191134746. Its totient is φ = 21489408.

The previous prime is 64473407. The next prime is 64473419. The reversal of 64473408 is 80437446.

64473408 is a `hidden beast` number, since 644 + 7 + 3 + 4 + 0 + 8 = 666.

64473408 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 38340864 + 26132544 = 6192^2 + 5112^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64473407) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 1035 + ... + 11402.

Almost surely, 2^64473408 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64473408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95567373).

64473408 is an abundant number, since it is smaller than the sum of its proper divisors (126661338).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

64473408 is a wasteful number, since it uses less digits than its factorization.

64473408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12461 (or 12442 counting only the distinct ones).

The product of its (nonzero) digits is 64512, while the sum is 36.

The square root of 64473408 is about 8029.5334858259. The cubic root of 64473408 is about 400.9838448062.

The spelling of 64473408 in words is "sixty-four million, four hundred seventy-three thousand, four hundred eight".