400028430 has 16 divisors (see below), whose sum is σ = 960068304. Its totient is φ = 106674240.

The previous prime is 400028399. The next prime is 400028459. The reversal of 400028430 is 34820004.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 400028397 and 400028406.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 6667111 + ... + 6667170.

It is an arithmetic number, because the mean of its divisors is an integer number (60004269).

Almost surely, 2^400028430 is an apocalyptic number.

400028430 is an abundant number, since it is smaller than the sum of its proper divisors (560039874).

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

400028430 is a wasteful number, since it uses less digits than its factorization.

400028430 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13334291.

The product of its (nonzero) digits is 768, while the sum is 21.

The square root of 400028430 is about 20000.7107373713. The cubic root of 400028430 is about 736.8237554838.

Adding to 400028430 its reverse (34820004), we get a palindrome (434848434).

The spelling of 400028430 in words is "four hundred million, twenty-eight thousand, four hundred thirty".