25766420 has 24 divisors (see below), whose sum is σ = 54306504. Its totient is φ = 10269056.

The previous prime is 25766353. The next prime is 25766431. The reversal of 25766420 is 2466752.

It can be written as a sum of positive squares in 4 ways, for example, as 7907344 + 17859076 = 2812^2 + 4226^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3662 + ... + 8058.

It is an arithmetic number, because the mean of its divisors is an integer number (2262771).

Almost surely, 2^25766420 is an apocalyptic number.

25766420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25766420 is an abundant number, since it is smaller than the sum of its proper divisors (28540084).

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

25766420 is a wasteful number, since it uses less digits than its factorization.

25766420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4699 (or 4697 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 25766420 is about 5076.0634353798. The cubic root of 25766420 is about 295.3597831870.

The spelling of 25766420 in words is "twenty-five million, seven hundred sixty-six thousand, four hundred twenty".