28649727 has 8 divisors (see below), whose sum is σ = 42444080. Its totient is φ = 19099800.

The previous prime is 28649717. The next prime is 28649741. The reversal of 28649727 is 72794682.

It is not a de Polignac number, because 28649727 - 2¹⁰ = 28648703 is a prime.

It is a super-3 number, since 3×28649727³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28649717) 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, 530524 + ... + 530577.

It is an arithmetic number, because the mean of its divisors is an integer number (5305510).

Almost surely, 2^28649727 is an apocalyptic number.

28649727 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

28649727 is a deficient number, since it is larger than the sum of its proper divisors (13794353).

28649727 is a wasteful number, since it uses less digits than its factorization.

28649727 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1061110 (or 1061104 counting only the distinct ones).

The product of its digits is 338688, while the sum is 45.

The square root of 28649727 is about 5352.5439745975. The cubic root of 28649727 is about 305.9897151484.

The spelling of 28649727 in words is "twenty-eight million, six hundred forty-nine thousand, seven hundred twenty-seven".