400112500 has 36 divisors (see below), whose sum is σ = 875217420. Its totient is φ = 160040000.

The previous prime is 400112441. The next prime is 400112501. The reversal of 400112500 is 5211004.

It can be written as a sum of positive squares in 6 ways, for example, as 399120484 + 992016 = 19978^2 + 996^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400112501) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3505 + ... + 28504.

It is an arithmetic number, because the mean of its divisors is an integer number (24311595).

Almost surely, 2^400112500 is an apocalyptic number.

It is an amenable number.

400112500 is an abundant number, since it is smaller than the sum of its proper divisors (475104920).

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

400112500 is an equidigital number, since it uses as much as digits as its factorization.

400112500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32038 (or 32016 counting only the distinct ones).

The product of its (nonzero) digits is 40, while the sum is 13.

The square root of 400112500 is about 20002.8123022739. The cubic root of 400112500 is about 736.8753688439.

Adding to 400112500 its reverse (5211004), we get a palindrome (405323504).

The spelling of 400112500 in words is "four hundred million, one hundred twelve thousand, five hundred".