401220320 has 24 divisors (see below), whose sum is σ = 947883384. Its totient is φ = 160488064.

The previous prime is 401220317. The next prime is 401220343. The reversal of 401220320 is 23022104.

It is a junction number, because it is equal to n+sod(n) for n = 401220295 and 401220304.

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, 1253654 + ... + 1253973.

It is an arithmetic number, because the mean of its divisors is an integer number (39495141).

Almost surely, 2^401220320 is an apocalyptic number.

401220320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

401220320 is an abundant number, since it is smaller than the sum of its proper divisors (546663064).

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

401220320 is a wasteful number, since it uses less digits than its factorization.

401220320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2507642 (or 2507634 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 14.

The square root of 401220320 is about 20030.4847669746. The cubic root of 401220320 is about 737.5548219326.

Adding to 401220320 its reverse (23022104), we get a palindrome (424242424).

The spelling of 401220320 in words is "four hundred one million, two hundred twenty thousand, three hundred twenty".