28376629 has 4 divisors (see below), whose sum is σ = 28416076. Its totient is φ = 28337184.

The previous prime is 28376627. The next prime is 28376639. The reversal of 28376629 is 92667382.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 92667382 = 2 ⋅46333691.

It can be written as a sum of positive squares in 2 ways, for example, as 25989604 + 2387025 = 5098^2 + 1545^2 .

It is a cyclic number.

It is not a de Polignac number, because 28376629 - 2¹ = 28376627 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 (28376627) 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, 18624 + ... + 20089.

It is an arithmetic number, because the mean of its divisors is an integer number (7104019).

Almost surely, 2^28376629 is an apocalyptic number.

It is an amenable number.

28376629 is a deficient number, since it is larger than the sum of its proper divisors (39447).

28376629 is an equidigital number, since it uses as much as digits as its factorization.

28376629 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39446.

The product of its digits is 217728, while the sum is 43.

The square root of 28376629 is about 5326.9718414874. The cubic root of 28376629 is about 305.0143467228.

The spelling of 28376629 in words is "twenty-eight million, three hundred seventy-six thousand, six hundred twenty-nine".