400202154320 has 80 divisors (see below), whose sum is σ = 981183896640. Its totient is φ = 151385859072.

The previous prime is 400202154283. The next prime is 400202154347. The reversal of 400202154320 is 23451202004.

It is a happy number.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 621932 + ... + 1089588.

It is an arithmetic number, because the mean of its divisors is an integer number (12264798708).

Almost surely, 2^400202154320 is an apocalyptic number.

400202154320 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 400202154320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (490591948320).

400202154320 is an abundant number, since it is smaller than the sum of its proper divisors (580981742320).

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

400202154320 is a wasteful number, since it uses less digits than its factorization.

400202154320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468252 (or 468246 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 23.

Adding to 400202154320 its reverse (23451202004), we get a palindrome (423653356324).

The spelling of 400202154320 in words is "four hundred billion, two hundred two million, one hundred fifty-four thousand, three hundred twenty".