28610139 has 16 divisors (see below), whose sum is σ = 39772928. Its totient is φ = 18276192.

The previous prime is 28610129. The next prime is 28610149. The reversal of 28610139 is 93101682.

It is an interprime number because it is at equal distance from previous prime (28610129) and next prime (28610149).

It is not a de Polignac number, because 28610139 - 2⁸ = 28609883 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28610119) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5514 + ... + 9360.

It is an arithmetic number, because the mean of its divisors is an integer number (2485808).

Almost surely, 2^28610139 is an apocalyptic number.

28610139 is a deficient number, since it is larger than the sum of its proper divisors (11162789).

28610139 is a wasteful number, since it uses less digits than its factorization.

28610139 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3954.

The product of its (nonzero) digits is 2592, while the sum is 30.

The square root of 28610139 is about 5348.8446416025. The cubic root of 28610139 is about 305.8487120062.

The spelling of 28610139 in words is "twenty-eight million, six hundred ten thousand, one hundred thirty-nine".