400016370 has 64 divisors (see below), whose sum is σ = 1036183680. Its totient is φ = 98247168.

The previous prime is 400016359. The next prime is 400016399. The reversal of 400016370 is 73610004.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 240582 + ... + 242238.

It is an arithmetic number, because the mean of its divisors is an integer number (16190370).

Almost surely, 2^400016370 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400016370, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (518091840).

400016370 is an abundant number, since it is smaller than the sum of its proper divisors (636167310).

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

400016370 is a wasteful number, since it uses less digits than its factorization.

400016370 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2299.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 400016370 is about 20000.4092458129. The cubic root of 400016370 is about 736.8163508569.

Adding to 400016370 its reverse (73610004), we get a palindrome (473626374).

The spelling of 400016370 in words is "four hundred million, sixteen thousand, three hundred seventy".