25280780 has 48 divisors (see below), whose sum is σ = 60963840. Its totient is φ = 8626368.

The previous prime is 25280767. The next prime is 25280789. The reversal of 25280780 is 8708252.

It is not an unprimeable number, because it can be changed into a prime (25280789) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 50009 + ... + 50511.

It is an arithmetic number, because the mean of its divisors is an integer number (1270080).

Almost surely, 2^25280780 is an apocalyptic number.

25280780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25280780 is an abundant number, since it is smaller than the sum of its proper divisors (35683060).

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

25280780 is a wasteful number, since it uses less digits than its factorization.

25280780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878 (or 876 counting only the distinct ones).

The product of its (nonzero) digits is 8960, while the sum is 32.

The square root of 25280780 is about 5027.9996022275. Note that the first 3 decimals coincide. The cubic root of 25280780 is about 293.4923753010.

The spelling of 25280780 in words is "twenty-five million, two hundred eighty thousand, seven hundred eighty".