400480280648 has 36 divisors (see below), whose sum is σ = 873523859715. Its totient is φ = 171629036208.

The previous prime is 400480280609. The next prime is 400480280689. The reversal of 400480280648 is 846082084004.

It is a happy number.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It can be written as a sum of positive squares in only one way, i.e., 200240140324 + 200240140324 = 447482^2 + 447482^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=447482.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400480280599 and 400480280608.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 12513515 + ... + 12545477.

Almost surely, 2^400480280648 is an apocalyptic number.

It is an amenable number.

400480280648 is an abundant number, since it is smaller than the sum of its proper divisors (473043579067).

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

400480280648 is an frugal number, since it uses more digits than its factorization.

400480280648 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63946 (or 31972 counting only the distinct ones).

The product of its (nonzero) digits is 393216, while the sum is 44.

The spelling of 400480280648 in words is "four hundred billion, four hundred eighty million, two hundred eighty thousand, six hundred forty-eight".