400442420040 has 64 divisors (see below), whose sum is σ = 1293737054400. Its totient is φ = 98570441472.

The previous prime is 400442420029. The next prime is 400442420071. The reversal of 400442420040 is 40024244004.

400442420040 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 128345370 + ... + 128348489.

It is an arithmetic number, because the mean of its divisors is an integer number (20214641475).

Almost surely, 2^400442420040 is an apocalyptic number.

400442420040 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400442420040 is an abundant number, since it is smaller than the sum of its proper divisors (893294634360).

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

400442420040 is a wasteful number, since it uses less digits than its factorization.

400442420040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 256693886 (or 256693882 counting only the distinct ones).

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

Adding to 400442420040 its reverse (40024244004), we get a palindrome (440466664044).

The spelling of 400442420040 in words is "four hundred billion, four hundred forty-two million, four hundred twenty thousand, forty".