401243216 has 80 divisors (see below), whose sum is σ = 902650560. Its totient is φ = 170864640.

The previous prime is 401243209. The next prime is 401243221. The reversal of 401243216 is 612342104.

It is a super-2 number, since 2×401243216² = 321992236772045312, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 401243191 and 401243200.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 323750 + ... + 324986.

It is an arithmetic number, because the mean of its divisors is an integer number (11283132).

Almost surely, 2^401243216 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 401243216, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (451325280).

401243216 is an abundant number, since it is smaller than the sum of its proper divisors (501407344).

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

401243216 is a wasteful number, since it uses less digits than its factorization.

401243216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1372 (or 1366 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 401243216 is about 20031.0562876749. The cubic root of 401243216 is about 737.5688514098.

The spelling of 401243216 in words is "four hundred one million, two hundred forty-three thousand, two hundred sixteen".