25949620 has 24 divisors (see below), whose sum is σ = 54679464. Its totient is φ = 10344576.

The previous prime is 25949579. The next prime is 25949621. The reversal of 25949620 is 2694952.

It can be written as a sum of positive squares in 4 ways, for example, as 784 + 25948836 = 28^2 + 5094^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 25949620.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25949621) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4294 + ... + 8386.

It is an arithmetic number, because the mean of its divisors is an integer number (2278311).

Almost surely, 2^25949620 is an apocalyptic number.

25949620 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25949620 is an abundant number, since it is smaller than the sum of its proper divisors (28729844).

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

25949620 is a wasteful number, since it uses less digits than its factorization.

25949620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4419 (or 4417 counting only the distinct ones).

The product of its (nonzero) digits is 38880, while the sum is 37.

The square root of 25949620 is about 5094.0769526971. The cubic root of 25949620 is about 296.0581362556.

It can be divided in two parts, 25949 and 620, that added together give a square (26569 = 163²).

The spelling of 25949620 in words is "twenty-five million, nine hundred forty-nine thousand, six hundred twenty".