400335220240 has 20 divisors (see below), whose sum is σ = 930779387244. Its totient is φ = 160134088064.

The previous prime is 400335220223. The next prime is 400335220297. The reversal of 400335220240 is 42022533004.

It can be written as a sum of positive squares in 2 ways, for example, as 189367706896 + 210967513344 = 435164^2 + 459312^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2502095047 + ... + 2502095206.

Almost surely, 2^400335220240 is an apocalyptic number.

400335220240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400335220240 is an abundant number, since it is smaller than the sum of its proper divisors (530444167004).

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

400335220240 is a wasteful number, since it uses less digits than its factorization.

400335220240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5004190266 (or 5004190260 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 25.

Adding to 400335220240 its reverse (42022533004), we get a palindrome (442357753244).

The spelling of 400335220240 in words is "four hundred billion, three hundred thirty-five million, two hundred twenty thousand, two hundred forty".