401786481 has 8 divisors (see below), whose sum is σ = 545823360. Its totient is φ = 262803632.

The previous prime is 401786477. The next prime is 401786491. The reversal of 401786481 is 184687104.

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

It is a cyclic number.

It is not a de Polignac number, because 401786481 - 2² = 401786477 is a prime.

It is a super-2 number, since 2×401786481² = 322864752628726722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401786491) 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, 1263321 + ... + 1263638.

It is an arithmetic number, because the mean of its divisors is an integer number (68227920).

Almost surely, 2^401786481 is an apocalyptic number.

It is an amenable number.

401786481 is a deficient number, since it is larger than the sum of its proper divisors (144036879).

401786481 is a wasteful number, since it uses less digits than its factorization.

401786481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2527015.

The product of its (nonzero) digits is 43008, while the sum is 39.

The square root of 401786481 is about 20044.6122686372. The cubic root of 401786481 is about 737.9015794750.

The spelling of 401786481 in words is "four hundred one million, seven hundred eighty-six thousand, four hundred eighty-one".