28739513 has 8 divisors (see below), whose sum is σ = 32019840. Its totient is φ = 25570480.

The previous prime is 28739507. The next prime is 28739519. The reversal of 28739513 is 31593782.

It is an interprime number because it is at equal distance from previous prime (28739507) and next prime (28739519).

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 28739513 - 2¹⁴ = 28723129 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28739519) 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, 27278 + ... + 28311.

It is an arithmetic number, because the mean of its divisors is an integer number (4002480).

Almost surely, 2^28739513 is an apocalyptic number.

It is an amenable number.

28739513 is a deficient number, since it is larger than the sum of its proper divisors (3280327).

28739513 is a wasteful number, since it uses less digits than its factorization.

28739513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55647.

The product of its digits is 45360, while the sum is 38.

The square root of 28739513 is about 5360.9246403955. The cubic root of 28739513 is about 306.3090310753.

The spelling of 28739513 in words is "twenty-eight million, seven hundred thirty-nine thousand, five hundred thirteen".