64490906 has 8 divisors (see below), whose sum is σ = 96899124. Its totient is φ = 32191200.

The previous prime is 64490893. The next prime is 64490929. The reversal of 64490906 is 60909446.

64490906 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 2 ways, for example, as 64080025 + 410881 = 8005^2 + 641^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 64490906.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 25625 + ... + 28028.

Almost surely, 2^64490906 is an apocalyptic number.

64490906 is a deficient number, since it is larger than the sum of its proper divisors (32408218).

64490906 is a wasteful number, since it uses less digits than its factorization.

64490906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54256.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 64490906 is about 8030.6230144367. The cubic root of 64490906 is about 401.0201170249.

The spelling of 64490906 in words is "sixty-four million, four hundred ninety thousand, nine hundred six".