24402420 has 144 divisors (see below), whose sum is σ = 85857408. Its totient is φ = 5495040.

The previous prime is 24402409. The next prime is 24402439. The reversal of 24402420 is 2420442.

24402420 is a `hidden beast` number, since 244 + 0 + 2 + 420 = 666.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 24402393 and 24402402.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 134730 + ... + 134910.

It is an arithmetic number, because the mean of its divisors is an integer number (596232).

Almost surely, 2^24402420 is an apocalyptic number.

24402420 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 24402420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42928704).

24402420 is an abundant number, since it is smaller than the sum of its proper divisors (61454988).

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

24402420 is a wasteful number, since it uses less digits than its factorization.

24402420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310 (or 305 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 18.

The square root of 24402420 is about 4939.8805653578. The cubic root of 24402420 is about 290.0531808930.

Adding to 24402420 its reverse (2420442), we get a palindrome (26822862).

The spelling of 24402420 in words is "twenty-four million, four hundred two thousand, four hundred twenty".