64036240 has 40 divisors (see below), whose sum is σ = 151418880. Its totient is φ = 25178496.

The previous prime is 64036237. The next prime is 64036241. The reversal of 64036240 is 4263046.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (64036241) 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, 2064 + ... + 11503.

It is an arithmetic number, because the mean of its divisors is an integer number (3785472).

Almost surely, 2^64036240 is an apocalyptic number.

It is an amenable number.

64036240 is an abundant number, since it is smaller than the sum of its proper divisors (87382640).

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

64036240 is a wasteful number, since it uses less digits than its factorization.

64036240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13639 (or 13633 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 25.

The square root of 64036240 is about 8002.2646794517. The cubic root of 64036240 is about 400.0754857539.

Adding to 64036240 its reverse (4263046), we get a palindrome (68299286).

The spelling of 64036240 in words is "sixty-four million, thirty-six thousand, two hundred forty".