24138820 has 12 divisors (see below), whose sum is σ = 50691564. Its totient is φ = 9655520.

The previous prime is 24138809. The next prime is 24138839. The reversal of 24138820 is 2883142.

It can be written as a sum of positive squares in 2 ways, for example, as 3326976 + 20811844 = 1824^2 + 4562^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 603451 + ... + 603490.

It is an arithmetic number, because the mean of its divisors is an integer number (4224297).

Almost surely, 2^24138820 is an apocalyptic number.

24138820 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

24138820 is an abundant number, since it is smaller than the sum of its proper divisors (26552744).

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

24138820 is a wasteful number, since it uses less digits than its factorization.

24138820 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1206950 (or 1206948 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 28.

The square root of 24138820 is about 4913.1273136364. The cubic root of 24138820 is about 289.0049926701.

The spelling of 24138820 in words is "twenty-four million, one hundred thirty-eight thousand, eight hundred twenty".