400242420420 has 48 divisors (see below), whose sum is σ = 1156829710848. Its totient is φ = 103288366080.

The previous prime is 400242420337. The next prime is 400242420427. The reversal of 400242420420 is 24024242004.

It is not an unprimeable number, because it can be changed into a prime (400242420427) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 107590189 + ... + 107593908.

It is an arithmetic number, because the mean of its divisors is an integer number (24100618976).

Almost surely, 2^400242420420 is an apocalyptic number.

It is an amenable number.

400242420420 is an abundant number, since it is smaller than the sum of its proper divisors (756587290428).

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

400242420420 is a wasteful number, since it uses less digits than its factorization.

400242420420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215184140 (or 215184138 counting only the distinct ones).

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

Adding to 400242420420 its reverse (24024242004), we get a palindrome (424266662424).

The spelling of 400242420420 in words is "four hundred billion, two hundred forty-two million, four hundred twenty thousand, four hundred twenty".