28629785 has 12 divisors (see below), whose sum is σ = 36497388. Its totient is φ = 21555456.

The previous prime is 28629781. The next prime is 28629803. The reversal of 28629785 is 58792682.

It can be written as a sum of positive squares in 6 ways, for example, as 582169 + 28047616 = 763^2 + 5296^2 .

It is not a de Polignac number, because 28629785 - 2² = 28629781 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28629781) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 8462 + ... + 11351.

It is an arithmetic number, because the mean of its divisors is an integer number (3041449).

Almost surely, 2^28629785 is an apocalyptic number.

It is an amenable number.

28629785 is a deficient number, since it is larger than the sum of its proper divisors (7867603).

28629785 is a wasteful number, since it uses less digits than its factorization.

28629785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19852 (or 19835 counting only the distinct ones).

The product of its digits is 483840, while the sum is 47.

The square root of 28629785 is about 5350.6807978051. The cubic root of 28629785 is about 305.9187026829.

The spelling of 28629785 in words is "twenty-eight million, six hundred twenty-nine thousand, seven hundred eighty-five".