212426644 has 12 divisors (see below), whose sum is σ = 377841268. Its totient is φ = 104472000.

The previous prime is 212426623. The next prime is 212426647. The reversal of 212426644 is 446624212.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 52707600 + 159719044 = 7260^2 + 12638^2 .

It is a super-2 number, since 2×212426644² = 90250158162205472, which contains 22 as substring.

It is a hoax number, since the sum of its digits (31) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (212426647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 435057 + ... + 435544.

Almost surely, 2^212426644 is an apocalyptic number.

It is an amenable number.

212426644 is a deficient number, since it is larger than the sum of its proper divisors (165414624).

212426644 is a wasteful number, since it uses less digits than its factorization.

212426644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 870666 (or 870664 counting only the distinct ones).

The product of its digits is 18432, while the sum is 31.

The square root of 212426644 is about 14574.8634298919. The cubic root of 212426644 is about 596.6729220585.

The spelling of 212426644 in words is "two hundred twelve million, four hundred twenty-six thousand, six hundred forty-four".