42400220404240 has 80 divisors (see below), whose sum is σ = 98977512890880. Its totient is φ = 16891875279360.

The previous prime is 42400220404193. The next prime is 42400220404247. The reversal of 42400220404240 is 4240402200424.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 42400220404199 and 42400220404208.

It is not an unprimeable number, because it can be changed into a prime (42400220404247) 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, 30087721 + ... + 31465399.

It is an arithmetic number, because the mean of its divisors is an integer number (1237218911136).

Almost surely, 2^{42400220404240} is an apocalyptic number.

42400220404240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

42400220404240 is an abundant number, since it is smaller than the sum of its proper divisors (56577292486640).

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

42400220404240 is a wasteful number, since it uses less digits than its factorization.

42400220404240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1379240 (or 1379234 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 42400220404240 its reverse (4240402200424), we get a palindrome (46640622604664).

The spelling of 42400220404240 in words is "forty-two trillion, four hundred billion, two hundred twenty million, four hundred four thousand, two hundred forty".