25905420 has 60 divisors (see below), whose sum is σ = 81271344. Its totient is φ = 6907680.

The previous prime is 25905403. The next prime is 25905431. The reversal of 25905420 is 2450952.

25905420 is a `hidden beast` number, since 2 + 590 + 54 + 20 = 666.

It is a tau number, because it is divible by the number of its divisors (60).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 6376 + ... + 9615.

Almost surely, 2^25905420 is an apocalyptic number.

25905420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25905420 is an abundant number, since it is smaller than the sum of its proper divisors (55365924).

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

25905420 is a wasteful number, since it uses less digits than its factorization.

25905420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16012 (or 16001 counting only the distinct ones).

The product of its (nonzero) digits is 3600, while the sum is 27.

The square root of 25905420 is about 5089.7367318949. The cubic root of 25905420 is about 295.8899487404.

The spelling of 25905420 in words is "twenty-five million, nine hundred five thousand, four hundred twenty".