400789049 has 4 divisors (see below), whose sum is σ = 413717760. Its totient is φ = 387860340.

The previous prime is 400789043. The next prime is 400789073. The reversal of 400789049 is 940987004.

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 not a de Polignac number, because 400789049 - 2¹² = 400784953 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400788997 and 400789015.

It is not an unprimeable number, because it can be changed into a prime (400789043) 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 3 ways as a sum of consecutive naturals, for example, 6464309 + ... + 6464370.

It is an arithmetic number, because the mean of its divisors is an integer number (103429440).

Almost surely, 2^400789049 is an apocalyptic number.

It is an amenable number.

400789049 is a deficient number, since it is larger than the sum of its proper divisors (12928711).

400789049 is a wasteful number, since it uses less digits than its factorization.

400789049 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12928710.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 400789049 is about 20019.7165064843. The cubic root of 400789049 is about 737.2904617395.

The spelling of 400789049 in words is "four hundred million, seven hundred eighty-nine thousand, forty-nine".