25919720 has 32 divisors (see below), whose sum is σ = 60203520. Its totient is φ = 10032960.

The previous prime is 25919717. The next prime is 25919723. The reversal of 25919720 is 2791952.

It is an interprime number because it is at equal distance from previous prime (25919717) and next prime (25919723).

It is not an unprimeable number, because it can be changed into a prime (25919723) 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, 9212 + ... + 11691.

It is an arithmetic number, because the mean of its divisors is an integer number (1881360).

Almost surely, 2^25919720 is an apocalyptic number.

25919720 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

25919720 is an abundant number, since it is smaller than the sum of its proper divisors (34283800).

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

25919720 is a wasteful number, since it uses less digits than its factorization.

25919720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20945 (or 20941 counting only the distinct ones).

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 25919720 is about 5091.1413258718. The cubic root of 25919720 is about 295.9443832686.

The spelling of 25919720 in words is "twenty-five million, nine hundred nineteen thousand, seven hundred twenty".