64201040 has 80 divisors (see below), whose sum is σ = 154275840. Its totient is φ = 24837120.

The previous prime is 64201037. The next prime is 64201051. The reversal of 64201040 is 4010246.

It is a tau number, because it is divible by the number of its divisors (80).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 505457 + ... + 505583.

It is an arithmetic number, because the mean of its divisors is an integer number (1928448).

Almost surely, 2^64201040 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 64201040, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77137920).

64201040 is an abundant number, since it is smaller than the sum of its proper divisors (90074800).

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

64201040 is a wasteful number, since it uses less digits than its factorization.

64201040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 300 (or 294 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 64201040 is about 8012.5551480161. Note that the first 3 decimals coincide. The cubic root of 64201040 is about 400.4183955437.

Adding to 64201040 its reverse (4010246), we get a palindrome (68211286).

The spelling of 64201040 in words is "sixty-four million, two hundred one thousand, forty".