28487405 has 16 divisors (see below), whose sum is σ = 35126784. Its totient is φ = 22168320.

The previous prime is 28487399. The next prime is 28487423. The reversal of 28487405 is 50478482.

It is not a de Polignac number, because 28487405 - 2²⁴ = 11710189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56384 + ... + 56886.

It is an arithmetic number, because the mean of its divisors is an integer number (2195424).

Almost surely, 2^28487405 is an apocalyptic number.

It is an amenable number.

28487405 is a deficient number, since it is larger than the sum of its proper divisors (6639379).

28487405 is a wasteful number, since it uses less digits than its factorization.

28487405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 796.

The product of its (nonzero) digits is 71680, while the sum is 38.

The square root of 28487405 is about 5337.3593658288. The cubic root of 28487405 is about 305.4107339176.

The spelling of 28487405 in words is "twenty-eight million, four hundred eighty-seven thousand, four hundred five".