28687461 has 8 divisors (see below), whose sum is σ = 41727264. Its totient is φ = 17386320.

The previous prime is 28687447. The next prime is 28687481. The reversal of 28687461 is 16478682.

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

It is not a de Polignac number, because 28687461 - 2⁵ = 28687429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28687411) 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, 434626 + ... + 434691.

It is an arithmetic number, because the mean of its divisors is an integer number (5215908).

Almost surely, 2^28687461 is an apocalyptic number.

It is an amenable number.

28687461 is a deficient number, since it is larger than the sum of its proper divisors (13039803).

28687461 is a wasteful number, since it uses less digits than its factorization.

28687461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869331.

The product of its digits is 129024, while the sum is 42.

The square root of 28687461 is about 5356.0676806777. The cubic root of 28687461 is about 306.1239939208.

The spelling of 28687461 in words is "twenty-eight million, six hundred eighty-seven thousand, four hundred sixty-one".