25105780 has 24 divisors (see below), whose sum is σ = 60254208. Its totient is φ = 8607648.

The previous prime is 25105777. The next prime is 25105781. The reversal of 25105780 is 8750152.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25105781) 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, 89524 + ... + 89803.

It is an arithmetic number, because the mean of its divisors is an integer number (2510592).

Almost surely, 2^25105780 is an apocalyptic number.

25105780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25105780 is an abundant number, since it is smaller than the sum of its proper divisors (35148428).

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

25105780 is a wasteful number, since it uses less digits than its factorization.

25105780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 179343 (or 179341 counting only the distinct ones).

The product of its (nonzero) digits is 2800, while the sum is 28.

The square root of 25105780 is about 5010.5668342015. The cubic root of 25105780 is about 292.8135969927.

The spelling of 25105780 in words is "twenty-five million, one hundred five thousand, seven hundred eighty".