1204638409 has 8 divisors (see below), whose sum is σ = 1353707712. Its totient is φ = 1063626960.

The previous prime is 1204638367. The next prime is 1204638433. The reversal of 1204638409 is 9048364021.

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

It is a cyclic number.

It is not a de Polignac number, because 1204638409 - 2¹¹ = 1204636361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1204638439) 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, 2014147 + ... + 2014744.

It is an arithmetic number, because the mean of its divisors is an integer number (169213464).

Almost surely, 2^1204638409 is an apocalyptic number.

It is an amenable number.

1204638409 is a deficient number, since it is larger than the sum of its proper divisors (149069303).

1204638409 is a wasteful number, since it uses less digits than its factorization.

1204638409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4028927.

The product of its (nonzero) digits is 41472, while the sum is 37.

The square root of 1204638409 is about 34707.9012474105. The cubic root of 1204638409 is about 1064.0259880329.

The spelling of 1204638409 in words is "one billion, two hundred four million, six hundred thirty-eight thousand, four hundred nine".