64485040 has 40 divisors (see below), whose sum is σ = 152052768. Its totient is φ = 25428480.

The previous prime is 64485037. The next prime is 64485041. The reversal of 64485040 is 4058446.

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

It is a junction number, because it is equal to n+sod(n) for n = 64484993 and 64485011.

It is not an unprimeable number, because it can be changed into a prime (64485041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4 + ... + 11356.

Almost surely, 2^64485040 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 64485040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76026384).

64485040 is an abundant number, since it is smaller than the sum of its proper divisors (87567728).

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

64485040 is a wasteful number, since it uses less digits than its factorization.

64485040 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11437 (or 11431 counting only the distinct ones).

The product of its (nonzero) digits is 15360, while the sum is 31.

The square root of 64485040 is about 8030.2577791750. The cubic root of 64485040 is about 401.0079579186.

The spelling of 64485040 in words is "sixty-four million, four hundred eighty-five thousand, forty".