25435920 has 40 divisors (see below), whose sum is σ = 78852096. Its totient is φ = 6782848.

The previous prime is 25435897. The next prime is 25435951. The reversal of 25435920 is 2953452.

It is a tau number, because it is divible by the number of its divisors (40).

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

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, 52752 + ... + 53231.

Almost surely, 2^25435920 is an apocalyptic number.

25435920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25435920 is an abundant number, since it is smaller than the sum of its proper divisors (53416176).

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

25435920 is a wasteful number, since it uses less digits than its factorization.

25435920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105999 (or 105993 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 30.

The square root of 25435920 is about 5043.4036126410. The cubic root of 25435920 is about 294.0915074495.

The spelling of 25435920 in words is "twenty-five million, four hundred thirty-five thousand, nine hundred twenty".