28075739 has 8 divisors (see below), whose sum is σ = 29083008. Its totient is φ = 27074880.

The previous prime is 28075717. The next prime is 28075753. The reversal of 28075739 is 93757082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28075739 - 2²⁰ = 27027163 is a prime.

It is a super-2 number, since 2×28075739² = 1576494240792242, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28075696 and 28075705.

It is not an unprimeable number, because it can be changed into a prime (28075759) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8399 + ... + 11255.

It is an arithmetic number, because the mean of its divisors is an integer number (3635376).

Almost surely, 2^28075739 is an apocalyptic number.

28075739 is a deficient number, since it is larger than the sum of its proper divisors (1007269).

28075739 is a wasteful number, since it uses less digits than its factorization.

28075739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3205.

The product of its (nonzero) digits is 105840, while the sum is 41.

The square root of 28075739 is about 5298.6544518396. The cubic root of 28075739 is about 303.9324461795.

The spelling of 28075739 in words is "twenty-eight million, seventy-five thousand, seven hundred thirty-nine".