28539461 has 8 divisors (see below), whose sum is σ = 29040000. Its totient is φ = 28042560.

The previous prime is 28539449. The next prime is 28539479. The reversal of 28539461 is 16493582.

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 28539461 - 2⁶ = 28539397 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28539431) 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, 18290 + ... + 19788.

It is an arithmetic number, because the mean of its divisors is an integer number (3630000).

Almost surely, 2^28539461 is an apocalyptic number.

It is an amenable number.

28539461 is a deficient number, since it is larger than the sum of its proper divisors (500539).

28539461 is a wasteful number, since it uses less digits than its factorization.

28539461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819.

The product of its digits is 51840, while the sum is 38.

The square root of 28539461 is about 5342.2337088525. The cubic root of 28539461 is about 305.5966498461.

The spelling of 28539461 in words is "twenty-eight million, five hundred thirty-nine thousand, four hundred sixty-one".