400144304004020 has 24 divisors (see below), whose sum is σ = 840304821885984. Its totient is φ = 160057381891616.

The previous prime is 400144304004017. The next prime is 400144304004059. The reversal of 400144304004020 is 20400403441004.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11463482 + ... + 30523761.

It is an arithmetic number, because the mean of its divisors is an integer number (35012700911916).

Almost surely, 2^{400144304004020} is an apocalyptic number.

It is an amenable number.

400144304004020 is an abundant number, since it is smaller than the sum of its proper divisors (440160517881964).

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

400144304004020 is a wasteful number, since it uses less digits than its factorization.

400144304004020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42463759 (or 42463757 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 26.

Adding to 400144304004020 its reverse (20400403441004), we get a palindrome (420544707445024).

The spelling of 400144304004020 in words is "four hundred trillion, one hundred forty-four billion, three hundred four million, four thousand, twenty".