401320064 has 16 divisors (see below), whose sum is σ = 799505070. Its totient is φ = 200659968.

The previous prime is 401320063. The next prime is 401320069. The reversal of 401320064 is 460023104.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 400320064 + 1000000 = 20008^2 + 1000^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a super-2 number, since 2×401320064² = 322115587537928192, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401320063) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1567529 + ... + 1567784.

Almost surely, 2^401320064 is an apocalyptic number.

It is an amenable number.

401320064 is a deficient number, since it is larger than the sum of its proper divisors (398185006).

401320064 is an equidigital number, since it uses as much as digits as its factorization.

401320064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3135327 (or 3135315 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 401320064 is about 20032.9744171953. The cubic root of 401320064 is about 737.6159359632.

Adding to 401320064 its reverse (460023104), we get a palindrome (861343168).

The spelling of 401320064 in words is "four hundred one million, three hundred twenty thousand, sixty-four".