28620129 has 32 divisors (see below), whose sum is σ = 43009920. Its totient is φ = 16837632.

The previous prime is 28620121. The next prime is 28620149. The reversal of 28620129 is 92102682.

It is not a de Polignac number, because 28620129 - 2³ = 28620121 is a prime.

It is a super-2 number, since 2×28620129² = 1638223567953282, which contains 22 as substring.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 28620096 and 28620105.

It is not an unprimeable number, because it can be changed into a prime (28620121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 54462 + ... + 54984.

It is an arithmetic number, because the mean of its divisors is an integer number (1344060).

Almost surely, 2^28620129 is an apocalyptic number.

28620129 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

28620129 is a deficient number, since it is larger than the sum of its proper divisors (14389791).

28620129 is a wasteful number, since it uses less digits than its factorization.

28620129 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 609.

The product of its (nonzero) digits is 3456, while the sum is 30.

The square root of 28620129 is about 5349.7784066258. The cubic root of 28620129 is about 305.8843062999.

The spelling of 28620129 in words is "twenty-eight million, six hundred twenty thousand, one hundred twenty-nine".