28540337 has 8 divisors (see below), whose sum is σ = 34334400. Its totient is φ = 23175504.

The previous prime is 28540333. The next prime is 28540339. The reversal of 28540337 is 73304582.

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 28540337 - 2² = 28540333 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28540333) 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, 107162 + ... + 107427.

It is an arithmetic number, because the mean of its divisors is an integer number (4291800).

Almost surely, 2^28540337 is an apocalyptic number.

It is an amenable number.

28540337 is a deficient number, since it is larger than the sum of its proper divisors (5794063).

28540337 is a wasteful number, since it uses less digits than its factorization.

28540337 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214615.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 28540337 is about 5342.3156963998. The cubic root of 28540337 is about 305.5997765102.

The spelling of 28540337 in words is "twenty-eight million, five hundred forty thousand, three hundred thirty-seven".