400442040877 has 4 divisors (see below), whose sum is σ = 400697589376. Its totient is φ = 400186492380.

The previous prime is 400442040851. The next prime is 400442040917. The reversal of 400442040877 is 778040244004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-400442040877 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 (400442040577) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 127771899 + ... + 127775032.

It is an arithmetic number, because the mean of its divisors is an integer number (100174397344).

Almost surely, 2^400442040877 is an apocalyptic number.

It is an amenable number.

400442040877 is a deficient number, since it is larger than the sum of its proper divisors (255548499).

400442040877 is a wasteful number, since it uses less digits than its factorization.

400442040877 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255548498.

The product of its (nonzero) digits is 200704, while the sum is 40.

The spelling of 400442040877 in words is "four hundred billion, four hundred forty-two million, forty thousand, eight hundred seventy-seven".