24780028 has 48 divisors (see below), whose sum is σ = 56197120. Its totient is φ = 9284544.

The previous prime is 24780013. The next prime is 24780071. The reversal of 24780028 is 82008742.

It is a super-2 number, since 2×24780028² = 1228099575361568, which contains 22 as substring.

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, 5125 + ... + 8707.

Almost surely, 2^24780028 is an apocalyptic number.

24780028 is a gapful number since it is divisible by the number (28) 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 24780028, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28098560).

24780028 is an abundant number, since it is smaller than the sum of its proper divisors (31417092).

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

24780028 is a wasteful number, since it uses less digits than its factorization.

24780028 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3626 (or 3624 counting only the distinct ones).

The product of its (nonzero) digits is 7168, while the sum is 31.

The square root of 24780028 is about 4977.9541982626. The cubic root of 24780028 is about 291.5416434322.

It can be divided in two parts, 247 and 80028, that multiplied together give a square (19766916 = 4446²).

The spelling of 24780028 in words is "twenty-four million, seven hundred eighty thousand, twenty-eight".