64412240 has 20 divisors (see below), whose sum is σ = 149758644. Its totient is φ = 25764864.

The previous prime is 64412197. The next prime is 64412281. The reversal of 64412240 is 4221446.

It can be written as a sum of positive squares in 2 ways, for example, as 16581184 + 47831056 = 4072^2 + 6916^2 .

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

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, 402497 + ... + 402656.

Almost surely, 2^64412240 is an apocalyptic number.

It is an amenable number.

64412240 is an abundant number, since it is smaller than the sum of its proper divisors (85346404).

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

64412240 is a wasteful number, since it uses less digits than its factorization.

64412240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805166 (or 805160 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 23.

The square root of 64412240 is about 8025.7236433857. The cubic root of 64412240 is about 400.8569959170.

Adding to 64412240 its reverse (4221446), we get a palindrome (68633686).

The spelling of 64412240 in words is "sixty-four million, four hundred twelve thousand, two hundred forty".