28461137 has 4 divisors (see below), whose sum is σ = 28516080. Its totient is φ = 28406196.

The previous prime is 28461133. The next prime is 28461149. The reversal of 28461137 is 73116482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28461137 - 2² = 28461133 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28461133) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26687 + ... + 27732.

It is an arithmetic number, because the mean of its divisors is an integer number (7129020).

Almost surely, 2^28461137 is an apocalyptic number.

It is an amenable number.

28461137 is a deficient number, since it is larger than the sum of its proper divisors (54943).

28461137 is an equidigital number, since it uses as much as digits as its factorization.

28461137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54942.

The product of its digits is 8064, while the sum is 32.

The square root of 28461137 is about 5334.8980308906. The cubic root of 28461137 is about 305.3168328146.

The spelling of 28461137 in words is "twenty-eight million, four hundred sixty-one thousand, one hundred thirty-seven".