25690420 has 24 divisors (see below), whose sum is σ = 61657344. Its totient is φ = 8808096.

The previous prime is 25690411. The next prime is 25690439. The reversal of 25690420 is 2409652.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 91612 + ... + 91891.

It is an arithmetic number, because the mean of its divisors is an integer number (2569056).

Almost surely, 2^25690420 is an apocalyptic number.

25690420 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25690420 is an abundant number, since it is smaller than the sum of its proper divisors (35966924).

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

25690420 is a wasteful number, since it uses less digits than its factorization.

25690420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 183519 (or 183517 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 25690420 is about 5068.5717909486. The cubic root of 25690420 is about 295.0691018816.

The spelling of 25690420 in words is "twenty-five million, six hundred ninety thousand, four hundred twenty".