64522840 has 32 divisors (see below), whose sum is σ = 146622960. Its totient is φ = 25552000.

The previous prime is 64522817. The next prime is 64522847. The reversal of 64522840 is 4822546.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64522847) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3946 + ... + 12025.

Almost surely, 2^64522840 is an apocalyptic number.

It is an amenable number.

64522840 is an abundant number, since it is smaller than the sum of its proper divisors (82100120).

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

64522840 is a wasteful number, since it uses less digits than its factorization.

64522840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16083 (or 16079 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 64522840 is about 8032.6110325348. The cubic root of 64522840 is about 401.0862972253.

The spelling of 64522840 in words is "sixty-four million, five hundred twenty-two thousand, eight hundred forty".