28057137 has 8 divisors (see below), whose sum is σ = 38420736. Its totient is φ = 18199152.

The previous prime is 28057067. The next prime is 28057151. The reversal of 28057137 is 73175082.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28057137 - 2⁷ = 28057009 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 28057098 and 28057107.

It is not an unprimeable number, because it can be changed into a prime (28057177) 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, 126273 + ... + 126494.

It is an arithmetic number, because the mean of its divisors is an integer number (4802592).

Almost surely, 2^28057137 is an apocalyptic number.

It is an amenable number.

28057137 is a deficient number, since it is larger than the sum of its proper divisors (10363599).

28057137 is a wasteful number, since it uses less digits than its factorization.

28057137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 252807.

The product of its (nonzero) digits is 11760, while the sum is 33.

The square root of 28057137 is about 5296.8988096810. The cubic root of 28057137 is about 303.8653063560.

The spelling of 28057137 in words is "twenty-eight million, fifty-seven thousand, one hundred thirty-seven".