28761617 has 8 divisors (see below), whose sum is σ = 29829696. Its totient is φ = 27708912.

The previous prime is 28761599. The next prime is 28761631. The reversal of 28761617 is 71616782.

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 28761617 - 2⁶ = 28761553 is a prime.

It is a super-2 number, since 2×28761617² = 1654461224909378, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28761647) 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, 38 + ... + 7584.

It is an arithmetic number, because the mean of its divisors is an integer number (3728712).

Almost surely, 2^28761617 is an apocalyptic number.

It is an amenable number.

28761617 is a deficient number, since it is larger than the sum of its proper divisors (1068079).

28761617 is a wasteful number, since it uses less digits than its factorization.

28761617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7687.

The product of its digits is 28224, while the sum is 38.

The square root of 28761617 is about 5362.9858288084. The cubic root of 28761617 is about 306.3875399417.

The spelling of 28761617 in words is "twenty-eight million, seven hundred sixty-one thousand, six hundred seventeen".