400682409 has 8 divisors (see below), whose sum is σ = 551476992. Its totient is φ = 258504720.

The previous prime is 400682407. The next prime is 400682441. The reversal of 400682409 is 904286004.

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

It is not a de Polignac number, because 400682409 - 2¹ = 400682407 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 400682409.

It is not an unprimeable number, because it can be changed into a prime (400682407) 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, 2154114 + ... + 2154299.

It is an arithmetic number, because the mean of its divisors is an integer number (68934624).

Almost surely, 2^400682409 is an apocalyptic number.

It is an amenable number.

400682409 is a deficient number, since it is larger than the sum of its proper divisors (150794583).

400682409 is a wasteful number, since it uses less digits than its factorization.

400682409 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4308447.

The product of its (nonzero) digits is 13824, while the sum is 33.

The square root of 400682409 is about 20017.0529549182. The cubic root of 400682409 is about 737.2250643861.

The spelling of 400682409 in words is "four hundred million, six hundred eighty-two thousand, four hundred nine".