25289240 has 16 divisors (see below), whose sum is σ = 56900880. Its totient is φ = 10115680.

The previous prime is 25289239. The next prime is 25289267. The reversal of 25289240 is 4298252.

It is a junction number, because it is equal to n+sod(n) for n = 25289197 and 25289206.

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, 316076 + ... + 316155.

It is an arithmetic number, because the mean of its divisors is an integer number (3556305).

Almost surely, 2^25289240 is an apocalyptic number.

25289240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25289240 is an abundant number, since it is smaller than the sum of its proper divisors (31611640).

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

25289240 is a wasteful number, since it uses less digits than its factorization.

25289240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 632242 (or 632238 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 25289240 is about 5028.8408207061. The cubic root of 25289240 is about 293.5251098999.

The spelling of 25289240 in words is "twenty-five million, two hundred eighty-nine thousand, two hundred forty".