28040597 has 8 divisors (see below), whose sum is σ = 30934680. Its totient is φ = 25251840.

The previous prime is 28040581. The next prime is 28040603. The reversal of 28040597 is 79504082.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 1094116 + 26946481 = 1046^2 + 5191^2 .

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 28040597 - 2⁴ = 28040581 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 (28046597) 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, 25772 + ... + 26837.

It is an arithmetic number, because the mean of its divisors is an integer number (3866835).

Almost surely, 2^28040597 is an apocalyptic number.

It is an amenable number.

28040597 is a deficient number, since it is larger than the sum of its proper divisors (2894083).

28040597 is a wasteful number, since it uses less digits than its factorization.

28040597 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 52663.

The product of its (nonzero) digits is 20160, while the sum is 35.

The square root of 28040597 is about 5295.3372885964. The cubic root of 28040597 is about 303.8055839390.

The spelling of 28040597 in words is "twenty-eight million, forty thousand, five hundred ninety-seven".