400515006 has 32 divisors (see below), whose sum is σ = 815391360. Its totient is φ = 131130464.

The previous prime is 400515001. The next prime is 400515023. The reversal of 400515006 is 600515004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400515001) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 86896 + ... + 91388.

It is an arithmetic number, because the mean of its divisors is an integer number (25480980).

Almost surely, 2^400515006 is an apocalyptic number.

400515006 is an abundant number, since it is smaller than the sum of its proper divisors (414876354).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400515006 is a wasteful number, since it uses less digits than its factorization.

400515006 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4760.

The product of its (nonzero) digits is 600, while the sum is 21.

The square root of 400515006 is about 20012.8710084286. The cubic root of 400515006 is about 737.1223805016.

The spelling of 400515006 in words is "four hundred million, five hundred fifteen thousand, six".