28739895 has 8 divisors (see below), whose sum is σ = 45983856. Its totient is φ = 15327936.

The previous prime is 28739891. The next prime is 28739917. The reversal of 28739895 is 59893782.

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

It is not a de Polignac number, because 28739895 - 2² = 28739891 is a prime.

It is a super-2 number, since 2×28739895² = 1651963129222050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28739891) 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, 957982 + ... + 958011.

It is an arithmetic number, because the mean of its divisors is an integer number (5747982).

Almost surely, 2^28739895 is an apocalyptic number.

28739895 is a deficient number, since it is larger than the sum of its proper divisors (17243961).

28739895 is a wasteful number, since it uses less digits than its factorization.

28739895 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916001.

The product of its digits is 1088640, while the sum is 51.

The square root of 28739895 is about 5360.9602684594. The cubic root of 28739895 is about 306.3103882026.

The spelling of 28739895 in words is "twenty-eight million, seven hundred thirty-nine thousand, eight hundred ninety-five".