28637461 has 8 divisors (see below), whose sum is σ = 30159360. Its totient is φ = 27138672.

The previous prime is 28637447. The next prime is 28637467. The reversal of 28637461 is 16473682.

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 28637461 - 2¹⁷ = 28506389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28637461.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28637467) 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, 3205 + ... + 8218.

It is an arithmetic number, because the mean of its divisors is an integer number (3769920).

Almost surely, 2^28637461 is an apocalyptic number.

It is an amenable number.

28637461 is a deficient number, since it is larger than the sum of its proper divisors (1521899).

28637461 is a wasteful number, since it uses less digits than its factorization.

28637461 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11555.

The product of its digits is 48384, while the sum is 37.

The square root of 28637461 is about 5351.3980416336. The cubic root of 28637461 is about 305.9460404377.

The spelling of 28637461 in words is "twenty-eight million, six hundred thirty-seven thousand, four hundred sixty-one".