64995240 has 64 divisors (see below), whose sum is σ = 203472000. Its totient is φ = 16577792.

The previous prime is 64995239. The next prime is 64995241. The reversal of 64995240 is 4259946.

It is an interprime number because it is at equal distance from previous prime (64995239) and next prime (64995241).

It is not an unprimeable number, because it can be changed into a prime (64995241) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9015 + ... + 14534.

It is an arithmetic number, because the mean of its divisors is an integer number (3179250).

Almost surely, 2^64995240 is an apocalyptic number.

64995240 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64995240 is an abundant number, since it is smaller than the sum of its proper divisors (138476760).

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

64995240 is a wasteful number, since it uses less digits than its factorization.

64995240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23586 (or 23582 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 39.

The square root of 64995240 is about 8061.9625402255. The cubic root of 64995240 is about 402.0627609246.

The spelling of 64995240 in words is "sixty-four million, nine hundred ninety-five thousand, two hundred forty".