401891975 has 24 divisors (see below), whose sum is σ = 513120432. Its totient is φ = 312076800.

The previous prime is 401891953. The next prime is 401891977. The reversal of 401891975 is 579198104.

It is not a de Polignac number, because 401891975 - 2¹² = 401887879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (401891977) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 184895 + ... + 187055.

It is an arithmetic number, because the mean of its divisors is an integer number (21380018).

Almost surely, 2^401891975 is an apocalyptic number.

401891975 is a deficient number, since it is larger than the sum of its proper divisors (111228457).

401891975 is a wasteful number, since it uses less digits than its factorization.

401891975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2387 (or 2382 counting only the distinct ones).

The product of its (nonzero) digits is 90720, while the sum is 44.

The square root of 401891975 is about 20047.2435761129. The cubic root of 401891975 is about 737.9661555463.

The spelling of 401891975 in words is "four hundred one million, eight hundred ninety-one thousand, nine hundred seventy-five".