212440104 has 32 divisors (see below), whose sum is σ = 590112000. Its totient is φ = 70813296.

The previous prime is 212440099. The next prime is 212440157. The reversal of 212440104 is 401044212.

212440104 is a `hidden beast` number, since 212 + 440 + 10 + 4 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 491544 + ... + 491975.

It is an arithmetic number, because the mean of its divisors is an integer number (18441000).

Almost surely, 2^212440104 is an apocalyptic number.

212440104 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

212440104 is an abundant number, since it is smaller than the sum of its proper divisors (377671896).

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

212440104 is a wasteful number, since it uses less digits than its factorization.

212440104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 983534 (or 983524 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 18.

The square root of 212440104 is about 14575.3251764755. The cubic root of 212440104 is about 596.6855241310.

Adding to 212440104 its reverse (401044212), we get a palindrome (613484316).

The spelling of 212440104 in words is "two hundred twelve million, four hundred forty thousand, one hundred four".