28629613 has 4 divisors (see below), whose sum is σ = 28892380. Its totient is φ = 28366848.

The previous prime is 28629589. The next prime is 28629617. The reversal of 28629613 is 31692682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20912329 + 7717284 = 4573^2 + 2778^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28629613 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 (28629617) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 131220 + ... + 131437.

It is an arithmetic number, because the mean of its divisors is an integer number (7223095).

It is a Poulet number, since it divides 2^28629612-1.

Almost surely, 2^28629613 is an apocalyptic number.

It is an amenable number.

28629613 is a deficient number, since it is larger than the sum of its proper divisors (262767).

28629613 is a wasteful number, since it uses less digits than its factorization.

28629613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 262766.

The product of its digits is 31104, while the sum is 37.

The square root of 28629613 is about 5350.6647250599. The cubic root of 28629613 is about 305.9180900561.

The spelling of 28629613 in words is "twenty-eight million, six hundred twenty-nine thousand, six hundred thirteen".