401344278 has 16 divisors (see below), whose sum is σ = 802891440. Its totient is φ = 133747616.

The previous prime is 401344243. The next prime is 401344297. The reversal of 401344278 is 872443104.

It is a super-2 number, since 2×401344278² = 322154458966682568, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 32608 + ... + 43196.

It is an arithmetic number, because the mean of its divisors is an integer number (50180715).

Almost surely, 2^401344278 is an apocalyptic number.

401344278 is an abundant number, since it is smaller than the sum of its proper divisors (401547162).

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

401344278 is a wasteful number, since it uses less digits than its factorization.

401344278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16911.

The product of its (nonzero) digits is 21504, while the sum is 33.

The square root of 401344278 is about 20033.5787616691. The cubic root of 401344278 is about 737.6307705675.

The spelling of 401344278 in words is "four hundred one million, three hundred forty-four thousand, two hundred seventy-eight".