401388448 has 24 divisors (see below), whose sum is σ = 791495712. Its totient is φ = 200373696.

The previous prime is 401388439. The next prime is 401388457. The reversal of 401388448 is 844883104.

It is an interprime number because it is at equal distance from previous prime (401388439) and next prime (401388457).

It is a super-2 number, since 2×401388448² = 322225372375697408, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 401388448.

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, 11011 + ... + 30397.

It is an arithmetic number, because the mean of its divisors is an integer number (32978988).

Almost surely, 2^401388448 is an apocalyptic number.

It is an amenable number.

401388448 is a deficient number, since it is larger than the sum of its proper divisors (390107264).

401388448 is a wasteful number, since it uses less digits than its factorization.

401388448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20044 (or 20036 counting only the distinct ones).

The product of its (nonzero) digits is 98304, while the sum is 40.

The square root of 401388448 is about 20034.6811304797. The cubic root of 401388448 is about 737.6578295937.

The spelling of 401388448 in words is "four hundred one million, three hundred eighty-eight thousand, four hundred forty-eight".