402048009 has 64 divisors (see below), whose sum is σ = 673263360. Its totient is φ = 235008000.

The previous prime is 402048001. The next prime is 402048013. The reversal of 402048009 is 900840204.

It is not a de Polignac number, because 402048009 - 2³ = 402048001 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (402048001) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1668129 + ... + 1668369.

It is an arithmetic number, because the mean of its divisors is an integer number (10519740).

Almost surely, 2^402048009 is an apocalyptic number.

It is an amenable number.

402048009 is a deficient number, since it is larger than the sum of its proper divisors (271215351).

402048009 is a wasteful number, since it uses less digits than its factorization.

402048009 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439 (or 433 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 27.

The square root of 402048009 is about 20051.1348556634. The cubic root of 402048009 is about 738.0616479667.

The spelling of 402048009 in words is "four hundred two million, forty-eight thousand, nine".