400991041 has 8 divisors (see below), whose sum is σ = 438551424. Its totient is φ = 363615120.

The previous prime is 400991027. The next prime is 400991077. The reversal of 400991041 is 140199004.

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

It is not a de Polignac number, because 400991041 - 2⁹ = 400990529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400991141) 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, 41545 + ... + 50278.

It is an arithmetic number, because the mean of its divisors is an integer number (54818928).

Almost surely, 2^400991041 is an apocalyptic number.

It is an amenable number.

400991041 is a deficient number, since it is larger than the sum of its proper divisors (37560383).

400991041 is a wasteful number, since it uses less digits than its factorization.

400991041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 92231.

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 400991041 is about 20024.7606976962. The cubic root of 400991041 is about 737.4143022514.

The spelling of 400991041 in words is "four hundred million, nine hundred ninety-one thousand, forty-one".