25550780 has 24 divisors (see below), whose sum is σ = 53896752. Its totient is φ = 10174592.

The previous prime is 25550761. The next prime is 25550783. The reversal of 25550780 is 8705552.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25550783) 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, 1919 + ... + 7401.

It is an arithmetic number, because the mean of its divisors is an integer number (2245698).

Almost surely, 2^25550780 is an apocalyptic number.

25550780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25550780 is an abundant number, since it is smaller than the sum of its proper divisors (28345972).

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

25550780 is a wasteful number, since it uses less digits than its factorization.

25550780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5725 (or 5723 counting only the distinct ones).

The product of its (nonzero) digits is 14000, while the sum is 32.

The square root of 25550780 is about 5054.7779377535. Note that the first 3 decimals coincide. The cubic root of 25550780 is about 294.5335153442.

The spelling of 25550780 in words is "twenty-five million, five hundred fifty thousand, seven hundred eighty".