400024420240 has 40 divisors (see below), whose sum is σ = 930328332408. Its totient is φ = 159963048960.

The previous prime is 400024420193. The next prime is 400024420261. The reversal of 400024420240 is 42024420004.

It can be written as a sum of positive squares in 4 ways, for example, as 2554695936 + 397469724304 = 50544^2 + 630452^2 .

It is a tau number, because it is divible by the number of its divisors (40).

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, 453631 + ... + 1002910.

Almost surely, 2^400024420240 is an apocalyptic number.

400024420240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400024420240 is an abundant number, since it is smaller than the sum of its proper divisors (530303912168).

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

400024420240 is a wasteful number, since it uses less digits than its factorization.

400024420240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1459987 (or 1459981 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 22.

Adding to 400024420240 its reverse (42024420004), we get a palindrome (442048840244).

The spelling of 400024420240 in words is "four hundred billion, twenty-four million, four hundred twenty thousand, two hundred forty".