27428629 has 4 divisors (see below), whose sum is σ = 27460576. Its totient is φ = 27396684.

The previous prime is 27428617. The next prime is 27428657. The reversal of 27428629 is 92682472.

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.

It is a cyclic number.

It is not a de Polignac number, because 27428629 - 2⁷ = 27428501 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27428591 and 27428600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27428659) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14649 + ... + 16414.

It is an arithmetic number, because the mean of its divisors is an integer number (6865144).

Almost surely, 2^27428629 is an apocalyptic number.

It is an amenable number.

27428629 is a deficient number, since it is larger than the sum of its proper divisors (31947).

27428629 is an equidigital number, since it uses as much as digits as its factorization.

27428629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31946.

The product of its digits is 96768, while the sum is 40.

The square root of 27428629 is about 5237.2348620240. The cubic root of 27428629 is about 301.5791874521.

The spelling of 27428629 in words is "twenty-seven million, four hundred twenty-eight thousand, six hundred twenty-nine".