28601597 has 4 divisors (see below), whose sum is σ = 28683900. Its totient is φ = 28519296.

The previous prime is 28601567. The next prime is 28601603. The reversal of 28601597 is 79510682.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 79510682 = 2 ⋅39755341.

It can be written as a sum of positive squares in 2 ways, for example, as 14055001 + 14546596 = 3749^2 + 3814^2 .

It is a cyclic number.

It is not a de Polignac number, because 28601597 - 2⁶ = 28601533 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28601597.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28601557) 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, 40628 + ... + 41325.

It is an arithmetic number, because the mean of its divisors is an integer number (7170975).

Almost surely, 2^28601597 is an apocalyptic number.

It is an amenable number.

28601597 is a deficient number, since it is larger than the sum of its proper divisors (82303).

28601597 is an equidigital number, since it uses as much as digits as its factorization.

28601597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82302.

The product of its (nonzero) digits is 30240, while the sum is 38.

The square root of 28601597 is about 5348.0460917984. The cubic root of 28601597 is about 305.8182703534.

The spelling of 28601597 in words is "twenty-eight million, six hundred one thousand, five hundred ninety-seven".