401248816 has 20 divisors (see below), whose sum is σ = 779482600. Its totient is φ = 200092032.

The previous prime is 401248769. The next prime is 401248829. The reversal of 401248816 is 618842104.

It is a super-2 number, since 2×401248816² = 322001224682803712, which contains 22 as substring.

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, 27021 + ... + 39148.

It is an arithmetic number, because the mean of its divisors is an integer number (38974130).

Almost surely, 2^401248816 is an apocalyptic number.

It is an amenable number.

401248816 is a deficient number, since it is larger than the sum of its proper divisors (378233784).

401248816 is a wasteful number, since it uses less digits than its factorization.

401248816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66556 (or 66550 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 401248816 is about 20031.1960701302. The cubic root of 401248816 is about 737.5722827171.

The spelling of 401248816 in words is "four hundred one million, two hundred forty-eight thousand, eight hundred sixteen".