400420440402 has 16 divisors (see below), whose sum is σ = 800859586080. Its totient is φ = 133470362592.

The previous prime is 400420440389. The next prime is 400420440403. The reversal of 400420440402 is 204044024004.

It is not an unprimeable number, because it can be changed into a prime (400420440403) 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, 493003 + ... + 1021710.

It is an arithmetic number, because the mean of its divisors is an integer number (50053724130).

Almost surely, 2^400420440402 is an apocalyptic number.

400420440402 is an abundant number, since it is smaller than the sum of its proper divisors (400439145678).

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

400420440402 is a wasteful number, since it uses less digits than its factorization.

400420440402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1558777.

The product of its (nonzero) digits is 4096, while the sum is 24.

Adding to 400420440402 its reverse (204044024004), we get a palindrome (604464464406).

The spelling of 400420440402 in words is "four hundred billion, four hundred twenty million, four hundred forty thousand, four hundred two".