401275866 has 8 divisors (see below), whose sum is σ = 802551744. Its totient is φ = 133758620.

The previous prime is 401275843. The next prime is 401275913. The reversal of 401275866 is 668572104.

It is a sphenic number, since it is the product of 3 distinct primes.

401275866 is an admirable number.

It is a super-2 number, since 2×401275866² = 322044641268099912, 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, 33439650 + ... + 33439661.

It is an arithmetic number, because the mean of its divisors is an integer number (100318968).

Almost surely, 2^401275866 is an apocalyptic number.

401275866 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

401275866 is a wasteful number, since it uses less digits than its factorization.

401275866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66879316.

The product of its (nonzero) digits is 80640, while the sum is 39.

The square root of 401275866 is about 20031.8712555767. The cubic root of 401275866 is about 737.5888567074.

The spelling of 401275866 in words is "four hundred one million, two hundred seventy-five thousand, eight hundred sixty-six".