25728737 has 8 divisors (see below), whose sum is σ = 26312736. Its totient is φ = 25150752.

The previous prime is 25728721. The next prime is 25728809. The reversal of 25728737 is 73782752.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 25728737 - 2⁴ = 25728721 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 25728694 and 25728703.

It is not an unprimeable number, because it can be changed into a prime (25728137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7778 + ... + 10580.

It is an arithmetic number, because the mean of its divisors is an integer number (3289092).

Almost surely, 2^25728737 is an apocalyptic number.

It is an amenable number.

25728737 is a deficient number, since it is larger than the sum of its proper divisors (583999).

25728737 is a wasteful number, since it uses less digits than its factorization.

25728737 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3007.

The product of its digits is 164640, while the sum is 41.

The square root of 25728737 is about 5072.3502442162. The cubic root of 25728737 is about 295.2157265303.

The spelling of 25728737 in words is "twenty-five million, seven hundred twenty-eight thousand, seven hundred thirty-seven".