25823780 has 24 divisors (see below), whose sum is σ = 55697208. Its totient is φ = 10050048.

The previous prime is 25823761. The next prime is 25823783. The reversal of 25823780 is 8732852.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1597696 + 24226084 = 1264^2 + 4922^2 .

It is a super-2 number, since 2×25823780² = 1333735226976800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 25823780.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25823783) 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, 16709 + ... + 18188.

It is an arithmetic number, because the mean of its divisors is an integer number (2320717).

Almost surely, 2^25823780 is an apocalyptic number.

25823780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25823780 is an abundant number, since it is smaller than the sum of its proper divisors (29873428).

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

25823780 is a wasteful number, since it uses less digits than its factorization.

25823780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34943 (or 34941 counting only the distinct ones).

The product of its (nonzero) digits is 26880, while the sum is 35.

The square root of 25823780 is about 5081.7103420010. The cubic root of 25823780 is about 295.5787927995.

The spelling of 25823780 in words is "twenty-five million, eight hundred twenty-three thousand, seven hundred eighty".