400024442440 has 64 divisors (see below), whose sum is σ = 1028750054400. Its totient is φ = 137135801088.

The previous prime is 400024442431. The next prime is 400024442491. The reversal of 400024442440 is 44244420004.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 400024442399 and 400024442408.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2567242 + ... + 2718598.

It is an arithmetic number, because the mean of its divisors is an integer number (16074219600).

Almost surely, 2^400024442440 is an apocalyptic number.

400024442440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

400024442440 is an abundant number, since it is smaller than the sum of its proper divisors (628725611960).

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

400024442440 is a wasteful number, since it uses less digits than its factorization.

400024442440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 160814 (or 160810 counting only the distinct ones).

The product of its (nonzero) digits is 16384, while the sum is 28.

Adding to 400024442440 its reverse (44244420004), we get a palindrome (444268862444).

The spelling of 400024442440 in words is "four hundred billion, twenty-four million, four hundred forty-two thousand, four hundred forty".