28035997 has 8 divisors (see below), whose sum is σ = 31571712. Its totient is φ = 24664800.

The previous prime is 28035971. The next prime is 28036003. The reversal of 28035997 is 79953082.

It is a happy number.

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 28035997 - 2²³ = 19647389 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 (28135997) 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, 40768 + ... + 41449.

It is an arithmetic number, because the mean of its divisors is an integer number (3946464).

Almost surely, 2^28035997 is an apocalyptic number.

It is an amenable number.

28035997 is a deficient number, since it is larger than the sum of its proper divisors (3535715).

28035997 is a wasteful number, since it uses less digits than its factorization.

28035997 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82259.

The product of its (nonzero) digits is 136080, while the sum is 43.

The square root of 28035997 is about 5294.9029264001. The cubic root of 28035997 is about 303.7889701450.

The spelling of 28035997 in words is "twenty-eight million, thirty-five thousand, nine hundred ninety-seven".