64371996 has 240 divisors, whose sum is σ = 204906240. Its totient is φ = 17418240.

The previous prime is 64371991. The next prime is 64371997. The reversal of 64371996 is 69917346.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64371991) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2076501 + ... + 2076531.

It is an arithmetic number, because the mean of its divisors is an integer number (853776).

Almost surely, 2^64371996 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 64371996, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (102453120).

64371996 is an abundant number, since it is smaller than the sum of its proper divisors (140534244).

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

64371996 is a wasteful number, since it uses less digits than its factorization.

64371996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 106 (or 95 counting only the distinct ones).

The product of its digits is 244944, while the sum is 45.

The square root of 64371996 is about 8023.2160634000. The cubic root of 64371996 is about 400.7734949664.

The spelling of 64371996 in words is "sixty-four million, three hundred seventy-one thousand, nine hundred ninety-six".