64347040 has 96 divisors (see below), whose sum is σ = 165173904. Its totient is φ = 23592960.

The previous prime is 64347029. The next prime is 64347047. The reversal of 64347040 is 4074346.

It can be written as a sum of positive squares in 8 ways, for example, as 41422096 + 22924944 = 6436^2 + 4788^2 .

It is not an unprimeable number, because it can be changed into a prime (64347047) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 111232 + ... + 111808.

Almost surely, 2^64347040 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64347040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82586952).

64347040 is an abundant number, since it is smaller than the sum of its proper divisors (100826864).

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

64347040 is a wasteful number, since it uses less digits than its factorization.

64347040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 650 (or 642 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 28.

The square root of 64347040 is about 8021.6606759449. The cubic root of 64347040 is about 400.7216971001.

The spelling of 64347040 in words is "sixty-four million, three hundred forty-seven thousand, forty".