28415761 has 12 divisors (see below), whose sum is σ = 31671556. Its totient is φ = 25470720.

The previous prime is 28415753. The next prime is 28415767. The reversal of 28415761 is 16751482.

It can be written as a sum of positive squares in 2 ways, for example, as 21446161 + 6969600 = 4631^2 + 2640^2 .

It is not a de Polignac number, because 28415761 - 2³ = 28415753 is a prime.

It is a super-3 number, since 3×28415761³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28415767) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7225 + ... + 10441.

Almost surely, 2^28415761 is an apocalyptic number.

It is an amenable number.

28415761 is a deficient number, since it is larger than the sum of its proper divisors (3255795).

28415761 is a wasteful number, since it uses less digits than its factorization.

28415761 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3312 (or 3301 counting only the distinct ones).

The product of its digits is 13440, while the sum is 34.

The square root of 28415761 is about 5330.6435821578. The cubic root of 28415761 is about 305.1544895028.

The spelling of 28415761 in words is "twenty-eight million, four hundred fifteen thousand, seven hundred sixty-one".