212678424 has 144 divisors (see below), whose sum is σ = 699444720. Its totient is φ = 58101120.

The previous prime is 212678413. The next prime is 212678437. The reversal of 212678424 is 424876212.

212678424 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×212678424² = 90464224070247552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 79834 + ... + 82454.

It is an arithmetic number, because the mean of its divisors is an integer number (4857255).

Almost surely, 2^212678424 is an apocalyptic number.

212678424 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 212678424, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (349722360).

212678424 is an abundant number, since it is smaller than the sum of its proper divisors (486766296).

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

212678424 is a wasteful number, since it uses less digits than its factorization.

212678424 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2670 (or 2656 counting only the distinct ones).

The product of its digits is 43008, while the sum is 36.

The square root of 212678424 is about 14583.4983457331. The cubic root of 212678424 is about 596.9085657467.

The spelling of 212678424 in words is "two hundred twelve million, six hundred seventy-eight thousand, four hundred twenty-four".