28147137 has 8 divisors (see below), whose sum is σ = 37825536. Its totient is φ = 18616752.

The previous prime is 28147127. The next prime is 28147183. The reversal of 28147137 is 73174182.

It is a happy number.

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

It is not a de Polignac number, because 28147137 - 2⁶ = 28147073 is a prime.

It is a super-2 number, since 2×28147137² = 1584522642593538, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 28147098 and 28147107.

It is not an unprimeable number, because it can be changed into a prime (28147127) 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, 36558 + ... + 37319.

It is an arithmetic number, because the mean of its divisors is an integer number (4728192).

Almost surely, 2^28147137 is an apocalyptic number.

It is an amenable number.

28147137 is a deficient number, since it is larger than the sum of its proper divisors (9678399).

28147137 is a wasteful number, since it uses less digits than its factorization.

28147137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74007.

The product of its digits is 9408, while the sum is 33.

The square root of 28147137 is about 5305.3875447511. The cubic root of 28147137 is about 304.1898665317.

The spelling of 28147137 in words is "twenty-eight million, one hundred forty-seven thousand, one hundred thirty-seven".