64906420 has 12 divisors (see below), whose sum is σ = 136303524. Its totient is φ = 25962560.

The previous prime is 64906411. The next prime is 64906421. The reversal of 64906420 is 2460946.

It can be written as a sum of positive squares in 2 ways, for example, as 11587216 + 53319204 = 3404^2 + 7302^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64906421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1622641 + ... + 1622680.

It is an arithmetic number, because the mean of its divisors is an integer number (11358627).

Almost surely, 2^64906420 is an apocalyptic number.

It is an amenable number.

64906420 is an abundant number, since it is smaller than the sum of its proper divisors (71397104).

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

64906420 is a wasteful number, since it uses less digits than its factorization.

64906420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3245330 (or 3245328 counting only the distinct ones).

The product of its (nonzero) digits is 10368, while the sum is 31.

The square root of 64906420 is about 8056.4520727179. The cubic root of 64906420 is about 401.8795295886.

The spelling of 64906420 in words is "sixty-four million, nine hundred six thousand, four hundred twenty".