24139420 has 48 divisors (see below), whose sum is σ = 53540928. Its totient is φ = 9123840.

The previous prime is 24139411. The next prime is 24139459. The reversal of 24139420 is 2493142.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44350 + ... + 44890.

It is an arithmetic number, because the mean of its divisors is an integer number (1115436).

Almost surely, 2^24139420 is an apocalyptic number.

24139420 is a gapful number since it is divisible by the number (20) 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 24139420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (26770464).

24139420 is an abundant number, since it is smaller than the sum of its proper divisors (29401508).

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

24139420 is a wasteful number, since it uses less digits than its factorization.

24139420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 670 (or 668 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 24139420 is about 4913.1883741619. The cubic root of 24139420 is about 289.0073871748.

The spelling of 24139420 in words is "twenty-four million, one hundred thirty-nine thousand, four hundred twenty".