28649577 has 16 divisors (see below), whose sum is σ = 41982912. Its totient is φ = 17233920.

The previous prime is 28649563. The next prime is 28649597. The reversal of 28649577 is 77594682.

It is not a de Polignac number, because 28649577 - 2⁴ = 28649561 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28649527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1353 + ... + 7689.

It is an arithmetic number, because the mean of its divisors is an integer number (2623932).

Almost surely, 2^28649577 is an apocalyptic number.

It is an amenable number.

28649577 is a deficient number, since it is larger than the sum of its proper divisors (13333335).

28649577 is a wasteful number, since it uses less digits than its factorization.

28649577 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6488.

The product of its digits is 846720, while the sum is 48.

The square root of 28649577 is about 5352.5299625504. The cubic root of 28649577 is about 305.9891811289.

The spelling of 28649577 in words is "twenty-eight million, six hundred forty-nine thousand, five hundred seventy-seven".