212400276 has 96 divisors (see below), whose sum is σ = 560821632. Its totient is φ = 62000640.

The previous prime is 212400257. The next prime is 212400277. The reversal of 212400276 is 672004212.

It is a super-2 number, since 2×212400276² = 90227754489752352, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212400277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 766650 + ... + 766926.

It is an arithmetic number, because the mean of its divisors is an integer number (5841892).

Almost surely, 2^212400276 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 212400276, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (280410816).

212400276 is an abundant number, since it is smaller than the sum of its proper divisors (348421356).

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

212400276 is a wasteful number, since it uses less digits than its factorization.

212400276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 489 (or 487 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 24.

The square root of 212400276 is about 14573.9588307364. The cubic root of 212400276 is about 596.6482331866.

Adding to 212400276 its reverse (672004212), we get a palindrome (884404488).

The spelling of 212400276 in words is "two hundred twelve million, four hundred thousand, two hundred seventy-six".