64112240 has 20 divisors (see below), whose sum is σ = 149061144. Its totient is φ = 25644864.

The previous prime is 64112239. The next prime is 64112263. The reversal of 64112240 is 4221146.

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

It is a super-2 number, since 2×64112240² = 8220758635635200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (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, 400622 + ... + 400781.

Almost surely, 2^64112240 is an apocalyptic number.

It is an amenable number.

64112240 is an abundant number, since it is smaller than the sum of its proper divisors (84948904).

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

64112240 is a wasteful number, since it uses less digits than its factorization.

64112240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 801416 (or 801410 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 64112240 is about 8007.0119270549. The cubic root of 64112240 is about 400.2336967713.

Adding to 64112240 its reverse (4221146), we get a palindrome (68333386).

The spelling of 64112240 in words is "sixty-four million, one hundred twelve thousand, two hundred forty".