25381920 has 48 divisors (see below), whose sum is σ = 79954560. Its totient is φ = 6768384.

The previous prime is 25381919. The next prime is 25381921. The reversal of 25381920 is 2918352.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (25381919) and next prime (25381921).

It is a tau number, because it is divible by the number of its divisors (48).

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

It is not an unprimeable number, because it can be changed into a prime (25381921) 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, 25960 + ... + 26919.

It is an arithmetic number, because the mean of its divisors is an integer number (1665720).

Almost surely, 2^25381920 is an apocalyptic number.

25381920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25381920 is an abundant number, since it is smaller than the sum of its proper divisors (54572640).

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

25381920 is a wasteful number, since it uses less digits than its factorization.

25381920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52897 (or 52889 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 30.

The square root of 25381920 is about 5038.0472407472. The cubic root of 25381920 is about 293.8832430083.

The spelling of 25381920 in words is "twenty-five million, three hundred eighty-one thousand, nine hundred twenty".