2402420409 has 6 divisors (see below), whose sum is σ = 3470162826. Its totient is φ = 1601613600.

The previous prime is 2402420359. The next prime is 2402420431. The reversal of 2402420409 is 9040242042.

It can be written as a sum of positive squares in only one way, i.e., 1676656809 + 725763600 = 40947^2 + 26940^2 .

It is not a de Polignac number, because 2402420409 - 2¹³ = 2402412217 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2402420509) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 133467792 + ... + 133467809.

It is an arithmetic number, because the mean of its divisors is an integer number (578360471).

Almost surely, 2^2402420409 is an apocalyptic number.

It is an amenable number.

2402420409 is a deficient number, since it is larger than the sum of its proper divisors (1067742417).

2402420409 is a wasteful number, since it uses less digits than its factorization.

2402420409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 266935607 (or 266935604 counting only the distinct ones).

The product of its (nonzero) digits is 4608, while the sum is 27.

The square root of 2402420409 is about 49014.4918263976. The cubic root of 2402420409 is about 1339.3158327057.

The spelling of 2402420409 in words is "two billion, four hundred two million, four hundred twenty thousand, four hundred nine".