28913629 has 4 divisors (see below), whose sum is σ = 28941084. Its totient is φ = 28886176.

The previous prime is 28913627. The next prime is 28913639. The reversal of 28913629 is 92631982.

It is a happy number.

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 9597604 + 19316025 = 3098^2 + 4395^2 .

It is a cyclic number.

It is not a de Polignac number, because 28913629 - 2¹ = 28913627 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28913591 and 28913600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28913623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12082 + ... + 14275.

It is an arithmetic number, because the mean of its divisors is an integer number (7235271).

Almost surely, 2^28913629 is an apocalyptic number.

It is an amenable number.

28913629 is a deficient number, since it is larger than the sum of its proper divisors (27455).

28913629 is a wasteful number, since it uses less digits than its factorization.

28913629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27454.

The product of its digits is 46656, while the sum is 40.

The square root of 28913629 is about 5377.1394811740. The cubic root of 28913629 is about 306.9263688285.

The spelling of 28913629 in words is "twenty-eight million, nine hundred thirteen thousand, six hundred twenty-nine".