28615739 has 2 divisors, whose sum is σ = 28615740. Its totient is φ = 28615738.

The previous prime is 28615733. The next prime is 28615747. The reversal of 28615739 is 93751682.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28615739 - 2⁴ = 28615723 is a prime.

It is a super-2 number, since 2×28615739² = 1637721037032242, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 28615696 and 28615705.

It is not a weakly prime, because it can be changed into another prime (28615733) 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 as a sum of consecutive naturals, namely, 14307869 + 14307870.

It is an arithmetic number, because the mean of its divisors is an integer number (14307870).

Almost surely, 2^28615739 is an apocalyptic number.

28615739 is a deficient number, since it is larger than the sum of its proper divisors (1).

28615739 is an equidigital number, since it uses as much as digits as its factorization.

28615739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 28615739 is about 5349.3680935228. The cubic root of 28615739 is about 305.8686657837.

The spelling of 28615739 in words is "twenty-eight million, six hundred fifteen thousand, seven hundred thirty-nine".