64503940 has 12 divisors (see below), whose sum is σ = 135458316. Its totient is φ = 25801568.

The previous prime is 64503931. The next prime is 64503941. The reversal of 64503940 is 4930546.

It can be written as a sum of positive squares in 2 ways, for example, as 16257024 + 48246916 = 4032^2 + 6946^2 .

It is not an unprimeable number, because it can be changed into a prime (64503941) 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, 1612579 + ... + 1612618.

It is an arithmetic number, because the mean of its divisors is an integer number (11288193).

Almost surely, 2^64503940 is an apocalyptic number.

It is an amenable number.

64503940 is an abundant number, since it is smaller than the sum of its proper divisors (70954376).

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

64503940 is a wasteful number, since it uses less digits than its factorization.

64503940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3225206 (or 3225204 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 64503940 is about 8031.4344920444. The cubic root of 64503940 is about 401.0471313976.

The spelling of 64503940 in words is "sixty-four million, five hundred three thousand, nine hundred forty".