28729710 has 96 divisors (see below), whose sum is σ = 80364960. Its totient is φ = 7098624.

The previous prime is 28729681. The next prime is 28729717. The reversal of 28729710 is 1792782.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28729717) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 90472 + ... + 90788.

It is an arithmetic number, because the mean of its divisors is an integer number (837135).

Almost surely, 2^28729710 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28729710, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40182480).

28729710 is an abundant number, since it is smaller than the sum of its proper divisors (51635250).

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

28729710 is a wasteful number, since it uses less digits than its factorization.

28729710 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 402 (or 399 counting only the distinct ones).

The product of its (nonzero) digits is 14112, while the sum is 36.

The square root of 28729710 is about 5360.0102611842. The cubic root of 28729710 is about 306.2741999480.

The spelling of 28729710 in words is "twenty-eight million, seven hundred twenty-nine thousand, seven hundred ten".