24220812 has 72 divisors (see below), whose sum is σ = 71024128. Its totient is φ = 6288480.

The previous prime is 24220799. The next prime is 24220813. The reversal of 24220812 is 21802242.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is not an unprimeable number, because it can be changed into a prime (24220813) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 8973 + ... + 11355.

Almost surely, 2^24220812 is an apocalyptic number.

24220812 is a gapful number since it is divisible by the number (22) 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 24220812, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (35512064).

24220812 is an abundant number, since it is smaller than the sum of its proper divisors (46803316).

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

24220812 is a wasteful number, since it uses less digits than its factorization.

24220812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2419 (or 2406 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 21.

The square root of 24220812 is about 4921.4644162078. The cubic root of 24220812 is about 289.3318426496.

The spelling of 24220812 in words is "twenty-four million, two hundred twenty thousand, eight hundred twelve".