400384290 has 32 divisors (see below), whose sum is σ = 965915136. Its totient is φ = 106214400.

The previous prime is 400384277. The next prime is 400384319. The reversal of 400384290 is 92483004.

It is a happy number.

400384290 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28786 + ... + 40365.

It is an arithmetic number, because the mean of its divisors is an integer number (30184848).

Almost surely, 2^400384290 is an apocalyptic number.

400384290 is an abundant number, since it is smaller than the sum of its proper divisors (565530846).

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

400384290 is a wasteful number, since it uses less digits than its factorization.

400384290 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69354.

The product of its (nonzero) digits is 6912, while the sum is 30.

The square root of 400384290 is about 20009.6049436264. The cubic root of 400384290 is about 737.0421802829.

The spelling of 400384290 in words is "four hundred million, three hundred eighty-four thousand, two hundred ninety".