64450140 has 48 divisors (see below), whose sum is σ = 188310528. Its totient is φ = 16439104.

The previous prime is 64450097. The next prime is 64450157. The reversal of 64450140 is 4105446.

It is a self number, because there is not a number n which added to its sum of digits gives 64450140.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 21972 + ... + 24731.

It is an arithmetic number, because the mean of its divisors is an integer number (3923136).

Almost surely, 2^64450140 is an apocalyptic number.

64450140 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64450140 is an abundant number, since it is smaller than the sum of its proper divisors (123860388).

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

64450140 is a wasteful number, since it uses less digits than its factorization.

64450140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46738 (or 46736 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 64450140 is about 8028.0844539653. The cubic root of 64450140 is about 400.9356015846.

Adding to 64450140 its reverse (4105446), we get a palindrome (68555586).

The spelling of 64450140 in words is "sixty-four million, four hundred fifty thousand, one hundred forty".