64010440 has 96 divisors (see below), whose sum is σ = 165424680. Its totient is φ = 22204416.

The previous prime is 64010431. The next prime is 64010477. The reversal of 64010440 is 4401046.

It can be written as a sum of positive squares in 12 ways, for example, as 1695204 + 62315236 = 1302^2 + 7894^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 114642 + ... + 115198.

Almost surely, 2^64010440 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 64010440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82712340).

64010440 is an abundant number, since it is smaller than the sum of its proper divisors (101414240).

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

64010440 is a wasteful number, since it uses less digits than its factorization.

64010440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 611 (or 594 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 19.

The square root of 64010440 is about 8000.6524733924. The cubic root of 64010440 is about 400.0217488175.

Adding to 64010440 its reverse (4401046), we get a palindrome (68411486).

The spelling of 64010440 in words is "sixty-four million, ten thousand, four hundred forty".