25516380 has 24 divisors (see below), whose sum is σ = 71446032. Its totient is φ = 6804352.

The previous prime is 25516367. The next prime is 25516423. The reversal of 25516380 is 8361552.

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

It is a nialpdrome in base 12.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 212577 + ... + 212696.

It is an arithmetic number, because the mean of its divisors is an integer number (2976918).

Almost surely, 2^25516380 is an apocalyptic number.

25516380 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25516380 is an abundant number, since it is smaller than the sum of its proper divisors (45929652).

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

25516380 is a wasteful number, since it uses less digits than its factorization.

25516380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 425285 (or 425283 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 30.

The square root of 25516380 is about 5051.3740704881. The cubic root of 25516380 is about 294.4012753716.

The spelling of 25516380 in words is "twenty-five million, five hundred sixteen thousand, three hundred eighty".