64550240 has 24 divisors (see below), whose sum is σ = 152500320. Its totient is φ = 25820032.

The previous prime is 64550231. The next prime is 64550257. The reversal of 64550240 is 4205546.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 201560 + ... + 201879.

It is an arithmetic number, because the mean of its divisors is an integer number (6354180).

Almost surely, 2^64550240 is an apocalyptic number.

It is an amenable number.

64550240 is an abundant number, since it is smaller than the sum of its proper divisors (87950080).

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

64550240 is a wasteful number, since it uses less digits than its factorization.

64550240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403454 (or 403446 counting only the distinct ones).

The product of its (nonzero) digits is 4800, while the sum is 26.

The square root of 64550240 is about 8034.3163990473. The cubic root of 64550240 is about 401.1430637351.

Adding to 64550240 its reverse (4205546), we get a palindrome (68755786).

The spelling of 64550240 in words is "sixty-four million, five hundred fifty thousand, two hundred forty".