25720032 has 96 divisors (see below), whose sum is σ = 74807712. Its totient is φ = 7686144.

The previous prime is 25720007. The next prime is 25720039. The reversal of 25720032 is 23002752.

It is a tau number, because it is divible by the number of its divisors (96).

It is a junction number, because it is equal to n+sod(n) for n = 25719990 and 25720008.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25720039) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 45898 + ... + 46454.

It is an arithmetic number, because the mean of its divisors is an integer number (779247).

Almost surely, 2^25720032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 25720032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37403856).

25720032 is an abundant number, since it is smaller than the sum of its proper divisors (49087680).

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

25720032 is a wasteful number, since it uses less digits than its factorization.

25720032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 620 (or 612 counting only the distinct ones).

The product of its (nonzero) digits is 840, while the sum is 21.

The square root of 25720032 is about 5071.4920881334. The cubic root of 25720032 is about 295.1824285779.

Adding to 25720032 its reverse (23002752), we get a palindrome (48722784).

The spelling of 25720032 in words is "twenty-five million, seven hundred twenty thousand, thirty-two".