400000212450 has 144 divisors (see below), whose sum is σ = 1082113883136. Its totient is φ = 105929529600.

The previous prime is 400000212433. The next prime is 400000212467. The reversal of 400000212450 is 54212000004.

400000212450 is a `hidden beast` number, since 4 + 0 + 0 + 0 + 0 + 0 + 212 + 450 = 666.

It is an interprime number because it is at equal distance from previous prime (400000212433) and next prime (400000212467).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 55606054 + ... + 55613246.

It is an arithmetic number, because the mean of its divisors is an integer number (7514679744).

Almost surely, 2^400000212450 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 400000212450, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (541056941568).

400000212450 is an abundant number, since it is smaller than the sum of its proper divisors (682113670686).

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

400000212450 is a wasteful number, since it uses less digits than its factorization.

400000212450 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8049 (or 8041 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

Adding to 400000212450 its reverse (54212000004), we get a palindrome (454212212454).

The spelling of 400000212450 in words is "four hundred billion, two hundred twelve thousand, four hundred fifty".