24778 has 8 divisors (see below), whose sum is σ = 40068. Its totient is φ = 11424.

The previous prime is 24767. The next prime is 24781. The reversal of 24778 is 87742.

It can be written as a sum of positive squares in 2 ways, for example, as 23409 + 1369 = 153^2 + 37^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×24778² = 1227898568, which contains 22 as substring.

It is a plaindrome in base 10.

It is a congruent number.

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, 451 + ... + 502.

2²⁴⁷⁷⁸ is an apocalyptic number.

24778 is a deficient number, since it is larger than the sum of its proper divisors (15290).

24778 is a wasteful number, since it uses less digits than its factorization.

24778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 968.

The product of its digits is 3136, while the sum is 28.

The square root of 24778 is about 157.4102919126. The cubic root of 24778 is about 29.1533689949.

It can be divided in two parts, 2477 and 8, that added together give a triangular number (2485 = T₇₀).

The spelling of 24778 in words is "twenty-four thousand, seven hundred seventy-eight".