401240064 has 52 divisors (see below), whose sum is σ = 1069875656. Its totient is φ = 133742592.

The previous prime is 401240057. The next prime is 401240087. The reversal of 401240064 is 460042104.

It is a self number, because there is not a number n which added to its sum of digits gives 401240064.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4039 + ... + 28614.

Almost surely, 2^401240064 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 401240064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (534937828).

401240064 is an abundant number, since it is smaller than the sum of its proper divisors (668635592).

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

401240064 is an equidigital number, since it uses as much as digits as its factorization.

401240064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32680 (or 32658 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 401240064 is about 20030.9776096924. The cubic root of 401240064 is about 737.5669200599.

Adding to 401240064 its reverse (460042104), we get a palindrome (861282168).

The spelling of 401240064 in words is "four hundred one million, two hundred forty thousand, sixty-four".