25728212 has 6 divisors (see below), whose sum is σ = 45024378. Its totient is φ = 12864104.

The previous prime is 25728211. The next prime is 25728221. The reversal of 25728212 is 21282752.

It can be written as a sum of positive squares in only one way, i.e., 13645636 + 12082576 = 3694^2 + 3476^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (25728211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3216023 + ... + 3216030.

It is an arithmetic number, because the mean of its divisors is an integer number (7504063).

Almost surely, 2^25728212 is an apocalyptic number.

It is an amenable number.

25728212 is a deficient number, since it is larger than the sum of its proper divisors (19296166).

25728212 is a wasteful number, since it uses less digits than its factorization.

25728212 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6432057 (or 6432055 counting only the distinct ones).

The product of its digits is 4480, while the sum is 29.

The square root of 25728212 is about 5072.2984927940. The cubic root of 25728212 is about 295.2137185380.

The spelling of 25728212 in words is "twenty-five million, seven hundred twenty-eight thousand, two hundred twelve".