28649487 has 16 divisors (see below), whose sum is σ = 39674880. Its totient is φ = 18369600.

The previous prime is 28649483. The next prime is 28649501. The reversal of 28649487 is 78494682.

It is not a de Polignac number, because 28649487 - 2² = 28649483 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28649483) 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, 15787 + ... + 17507.

It is an arithmetic number, because the mean of its divisors is an integer number (2479680).

Almost surely, 2^28649487 is an apocalyptic number.

28649487 is a deficient number, since it is larger than the sum of its proper divisors (11025393).

28649487 is a wasteful number, since it uses less digits than its factorization.

28649487 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1934.

The product of its digits is 774144, while the sum is 48.

The square root of 28649487 is about 5352.5215553046. The cubic root of 28649487 is about 305.9888607163.

The spelling of 28649487 in words is "twenty-eight million, six hundred forty-nine thousand, four hundred eighty-seven".