400038205 has 12 divisors (see below), whose sum is σ = 558421020. Its totient is φ = 274311744.

The previous prime is 400038187. The next prime is 400038251. The reversal of 400038205 is 502830004.

It can be written as a sum of positive squares in 2 ways, for example, as 224820036 + 175218169 = 14994^2 + 13237^2 .

It is not a de Polignac number, because 400038205 - 2⁷ = 400038077 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 816160 + ... + 816649.

It is an arithmetic number, because the mean of its divisors is an integer number (46535085).

Almost surely, 2^400038205 is an apocalyptic number.

It is an amenable number.

400038205 is a deficient number, since it is larger than the sum of its proper divisors (158382815).

400038205 is a wasteful number, since it uses less digits than its factorization.

400038205 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1632828 (or 1632821 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 400038205 is about 20000.9551021945. The cubic root of 400038205 is about 736.8297570518.

Adding to 400038205 its reverse (502830004), we get a palindrome (902868209).

The spelling of 400038205 in words is "four hundred million, thirty-eight thousand, two hundred five".