64579280 has 20 divisors (see below), whose sum is σ = 150147012. Its totient is φ = 25831680.

The previous prime is 64579267. The next prime is 64579283. The reversal of 64579280 is 8297546.

It can be written as a sum of positive squares in 2 ways, for example, as 38241856 + 26337424 = 6184^2 + 5132^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64579283) 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, 403541 + ... + 403700.

Almost surely, 2^64579280 is an apocalyptic number.

It is an amenable number.

64579280 is an abundant number, since it is smaller than the sum of its proper divisors (85567732).

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

64579280 is a wasteful number, since it uses less digits than its factorization.

64579280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 807254 (or 807248 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 41.

The square root of 64579280 is about 8036.1234435516. The cubic root of 64579280 is about 401.2032104161.

The spelling of 64579280 in words is "sixty-four million, five hundred seventy-nine thousand, two hundred eighty".