400244020240 has 80 divisors (see below), whose sum is σ = 947578601088. Its totient is φ = 157197436928.

The previous prime is 400244020219. The next prime is 400244020279. The reversal of 400244020240 is 42020442004.

It is a tau number, because it is divible by the number of its divisors (80).

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, 760389 + ... + 1174171.

Almost surely, 2^400244020240 is an apocalyptic number.

400244020240 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400244020240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (473789300544).

400244020240 is an abundant number, since it is smaller than the sum of its proper divisors (547334580848).

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

400244020240 is a wasteful number, since it uses less digits than its factorization.

400244020240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 414016 (or 414010 counting only the distinct ones).

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

Adding to 400244020240 its reverse (42020442004), we get a palindrome (442264462244).

The spelling of 400244020240 in words is "four hundred billion, two hundred forty-four million, twenty thousand, two hundred forty".