400321230100 has 72 divisors (see below), whose sum is σ = 949149625536. Its totient is φ = 145344000000.

The previous prime is 400321230083. The next prime is 400321230103. The reversal of 400321230100 is 1032123004.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400321230103) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 421225 + ... + 988975.

It is an arithmetic number, because the mean of its divisors is an integer number (13182633688).

Almost surely, 2^400321230100 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400321230100, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (474574812768).

400321230100 is an abundant number, since it is smaller than the sum of its proper divisors (548828395436).

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

400321230100 is a wasteful number, since it uses less digits than its factorization.

400321230100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 568417 (or 568410 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 16.

Adding to 400321230100 its reverse (1032123004), we get a palindrome (401353353104).

The spelling of 400321230100 in words is "four hundred billion, three hundred twenty-one million, two hundred thirty thousand, one hundred".