64381722 has 16 divisors (see below), whose sum is σ = 129946080. Its totient is φ = 21263472.

The previous prime is 64381721. The next prime is 64381727. The reversal of 64381722 is 22718346.

It is a super-2 number, since 2×64381722² = 8290012255370568, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (64381721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48568 + ... + 49875.

It is an arithmetic number, because the mean of its divisors is an integer number (8121630).

Almost surely, 2^64381722 is an apocalyptic number.

64381722 is an abundant number, since it is smaller than the sum of its proper divisors (65564358).

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

64381722 is a wasteful number, since it uses less digits than its factorization.

64381722 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 98557.

The product of its digits is 16128, while the sum is 33.

The square root of 64381722 is about 8023.8221565536. The cubic root of 64381722 is about 400.7936783119.

The spelling of 64381722 in words is "sixty-four million, three hundred eighty-one thousand, seven hundred twenty-two".