400220673 has 4 divisors (see below), whose sum is σ = 533627568. Its totient is φ = 266813780.

The previous prime is 400220671. The next prime is 400220683. The reversal of 400220673 is 376022004.

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 400220673 - 2¹ = 400220671 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400220671) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 66703443 + ... + 66703448.

It is an arithmetic number, because the mean of its divisors is an integer number (133406892).

Almost surely, 2^400220673 is an apocalyptic number.

It is an amenable number.

400220673 is a deficient number, since it is larger than the sum of its proper divisors (133406895).

400220673 is a wasteful number, since it uses less digits than its factorization.

400220673 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133406894.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 400220673 is about 20005.5160643259. The cubic root of 400220673 is about 736.9417691996.

Adding to 400220673 its reverse (376022004), we get a palindrome (776242677).

The spelling of 400220673 in words is "four hundred million, two hundred twenty thousand, six hundred seventy-three".