25206780 has 48 divisors (see below), whose sum is σ = 71003520. Its totient is φ = 6681408.

The previous prime is 25206763. The next prime is 25206791. The reversal of 25206780 is 8760252.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9567 + ... + 11913.

It is an arithmetic number, because the mean of its divisors is an integer number (1479240).

Almost surely, 2^25206780 is an apocalyptic number.

25206780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25206780 is an abundant number, since it is smaller than the sum of its proper divisors (45796740).

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

25206780 is a wasteful number, since it uses less digits than its factorization.

25206780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2538 (or 2536 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 25206780 is about 5020.6354179526. The cubic root of 25206780 is about 293.2057324949.

The spelling of 25206780 in words is "twenty-five million, two hundred six thousand, seven hundred eighty".