400047821860 has 12 divisors (see below), whose sum is σ = 840100425948. Its totient is φ = 160019128736.

The previous prime is 400047821819. The next prime is 400047821869. The reversal of 400047821860 is 68128740004.

It can be written as a sum of positive squares in 2 ways, for example, as 294275870784 + 105771951076 = 542472^2 + 325226^2 .

It is not an unprimeable number, because it can be changed into a prime (400047821869) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10001195527 + ... + 10001195566.

It is an arithmetic number, because the mean of its divisors is an integer number (70008368829).

Almost surely, 2^400047821860 is an apocalyptic number.

It is an amenable number.

400047821860 is an abundant number, since it is smaller than the sum of its proper divisors (440052604088).

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

400047821860 is a wasteful number, since it uses less digits than its factorization.

400047821860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20002391102 (or 20002391100 counting only the distinct ones).

The product of its (nonzero) digits is 86016, while the sum is 40.

The spelling of 400047821860 in words is "four hundred billion, forty-seven million, eight hundred twenty-one thousand, eight hundred sixty".