25779984 has 40 divisors (see below), whose sum is σ = 67138560. Its totient is φ = 8523648.

The previous prime is 25779977. The next prime is 25779997. The reversal of 25779984 is 48997752.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3982 + ... + 8210.

It is an arithmetic number, because the mean of its divisors is an integer number (1678464).

Almost surely, 2^25779984 is an apocalyptic number.

25779984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

25779984 is an abundant number, since it is smaller than the sum of its proper divisors (41358576).

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

25779984 is a wasteful number, since it uses less digits than its factorization.

25779984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4367 (or 4361 counting only the distinct ones).

The product of its digits is 1270080, while the sum is 51.

The square root of 25779984 is about 5077.3993343049. The cubic root of 25779984 is about 295.4116020182.

It can be divided in two parts, 2577 and 9984, that added together give a triangular number (12561 = T₁₅₈).

The spelling of 25779984 in words is "twenty-five million, seven hundred seventy-nine thousand, nine hundred eighty-four".