400004290 has 16 divisors (see below), whose sum is σ = 822866112. Its totient is φ = 137144304.

The previous prime is 400004257. The next prime is 400004291. The reversal of 400004290 is 92400004.

400004290 is a modest number, since divided by 4290 gives 400 as remainder.

It is not an unprimeable number, because it can be changed into a prime (400004291) 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, 2857104 + ... + 2857243.

It is an arithmetic number, because the mean of its divisors is an integer number (51429132).

Almost surely, 2^400004290 is an apocalyptic number.

400004290 is an abundant number, since it is smaller than the sum of its proper divisors (422861822).

400004290 is a wasteful number, since it uses less digits than its factorization.

400004290 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5714361.

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 400004290 is about 20000.1072497124. The cubic root of 400004290 is about 736.8089338012.

Adding to 400004290 its reverse (92400004), we get a palindrome (492404294).

The spelling of 400004290 in words is "four hundred million, four thousand, two hundred ninety".