28616629 has 4 divisors (see below), whose sum is σ = 29282176. Its totient is φ = 27951084.

The previous prime is 28616617. The next prime is 28616639. The reversal of 28616629 is 92661682.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92661682 = 2 ⋅46330841.

It is a cyclic number.

It is not a de Polignac number, because 28616629 - 2⁷ = 28616501 is a prime.

It is a super-2 number, since 2×28616629² = 1637822910647282, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28616591 and 28616600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28616639) 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, 332709 + ... + 332794.

It is an arithmetic number, because the mean of its divisors is an integer number (7320544).

Almost surely, 2^28616629 is an apocalyptic number.

It is an amenable number.

28616629 is a deficient number, since it is larger than the sum of its proper divisors (665547).

28616629 is an equidigital number, since it uses as much as digits as its factorization.

28616629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 665546.

The product of its digits is 62208, while the sum is 40.

The square root of 28616629 is about 5349.4512802717. The cubic root of 28616629 is about 305.8718367694.

The spelling of 28616629 in words is "twenty-eight million, six hundred sixteen thousand, six hundred twenty-nine".