25161984 has 108 divisors (see below), whose sum is σ = 74082736. Its totient is φ = 8211456.

The previous prime is 25161979. The next prime is 25162001. The reversal of 25161984 is 48916152.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 154287 + ... + 154449.

Almost surely, 2^25161984 is an apocalyptic number.

25161984 is a gapful number since it is divisible by the number (24) 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 25161984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37041368).

25161984 is an abundant number, since it is smaller than the sum of its proper divisors (48920752).

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

25161984 is a wasteful number, since it uses less digits than its factorization.

25161984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 252 (or 235 counting only the distinct ones).

The product of its digits is 17280, while the sum is 36.

The square root of 25161984 is about 5016.1722458464. The cubic root of 25161984 is about 293.0319402021.

The spelling of 25161984 in words is "twenty-five million, one hundred sixty-one thousand, nine hundred eighty-four".