64965440 has 28 divisors (see below), whose sum is σ = 154699716. Its totient is φ = 25986048.

The previous prime is 64965391. The next prime is 64965457. The reversal of 64965440 is 4456946.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10086976 + 54878464 = 3176^2 + 7408^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64965394 and 64965403.

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, 101189 + ... + 101828.

Almost surely, 2^64965440 is an apocalyptic number.

It is an amenable number.

64965440 is an abundant number, since it is smaller than the sum of its proper divisors (89734276).

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

64965440 is a wasteful number, since it uses less digits than its factorization.

64965440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 203034 (or 203024 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 38.

The square root of 64965440 is about 8060.1141431124. The cubic root of 64965440 is about 402.0013035939.

The spelling of 64965440 in words is "sixty-four million, nine hundred sixty-five thousand, four hundred forty".