401205278 has 16 divisors (see below), whose sum is σ = 605592960. Its totient is φ = 199345536.

The previous prime is 401205271. The next prime is 401205281. The reversal of 401205278 is 872502104.

It is a self number, because there is not a number n which added to its sum of digits gives 401205278.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401205271) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 255251 + ... + 256817.

It is an arithmetic number, because the mean of its divisors is an integer number (37849560).

Almost surely, 2^401205278 is an apocalyptic number.

401205278 is a deficient number, since it is larger than the sum of its proper divisors (204387682).

401205278 is a wasteful number, since it uses less digits than its factorization.

401205278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2291.

The product of its (nonzero) digits is 4480, while the sum is 29.

The square root of 401205278 is about 20030.1092857728. The cubic root of 401205278 is about 737.5456046873.

The spelling of 401205278 in words is "four hundred one million, two hundred five thousand, two hundred seventy-eight".