401891386 has 16 divisors (see below), whose sum is σ = 649756800. Its totient is φ = 185331888.

The previous prime is 401891383. The next prime is 401891419. The reversal of 401891386 is 683198104.

It is a super-2 number, since 2×401891386² = 323033372282001992, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (401891383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28435 + ... + 40153.

It is an arithmetic number, because the mean of its divisors is an integer number (40609800).

Almost surely, 2^401891386 is an apocalyptic number.

401891386 is a deficient number, since it is larger than the sum of its proper divisors (247865414).

401891386 is a wasteful number, since it uses less digits than its factorization.

401891386 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13053.

The product of its (nonzero) digits is 41472, while the sum is 40.

The square root of 401891386 is about 20047.2288858086. The cubic root of 401891386 is about 737.9657950329.

The spelling of 401891386 in words is "four hundred one million, eight hundred ninety-one thousand, three hundred eighty-six".