28610501 has 4 divisors (see below), whose sum is σ = 29597100. Its totient is φ = 27623904.

The previous prime is 28610431. The next prime is 28610503. The reversal of 28610501 is 10501682.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 12602500 + 16008001 = 3550^2 + 4001^2 .

It is a cyclic number.

It is not a de Polignac number, because 28610501 - 2¹⁴ = 28594117 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28610503) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 493256 + ... + 493313.

It is an arithmetic number, because the mean of its divisors is an integer number (7399275).

Almost surely, 2^28610501 is an apocalyptic number.

It is an amenable number.

28610501 is a deficient number, since it is larger than the sum of its proper divisors (986599).

28610501 is an equidigital number, since it uses as much as digits as its factorization.

28610501 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 986598.

The product of its (nonzero) digits is 480, while the sum is 23.

The square root of 28610501 is about 5348.8784805789. The cubic root of 28610501 is about 305.8500019541.

The spelling of 28610501 in words is "twenty-eight million, six hundred ten thousand, five hundred one".