28681710 has 16 divisors (see below), whose sum is σ = 68836176. Its totient is φ = 7648448.

The previous prime is 28681699. The next prime is 28681711. The reversal of 28681710 is 1718682.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28681711) 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, 477999 + ... + 478058.

It is an arithmetic number, because the mean of its divisors is an integer number (4302261).

Almost surely, 2^28681710 is an apocalyptic number.

28681710 is an abundant number, since it is smaller than the sum of its proper divisors (40154466).

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

28681710 is a wasteful number, since it uses less digits than its factorization.

28681710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 956067.

The product of its (nonzero) digits is 5376, while the sum is 33.

The square root of 28681710 is about 5355.5307860193. The cubic root of 28681710 is about 306.1035362402.

The spelling of 28681710 in words is "twenty-eight million, six hundred eighty-one thousand, seven hundred ten".