28687430 has 16 divisors (see below), whose sum is σ = 51782544. Its totient is φ = 11442720.

The previous prime is 28687429. The next prime is 28687441. The reversal of 28687430 is 3478682.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 116 + ... + 7575.

It is an arithmetic number, because the mean of its divisors is an integer number (3236409).

Almost surely, 2^28687430 is an apocalyptic number.

28687430 is a deficient number, since it is larger than the sum of its proper divisors (23095114).

28687430 is a wasteful number, since it uses less digits than its factorization.

28687430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8071.

The product of its (nonzero) digits is 64512, while the sum is 38.

The square root of 28687430 is about 5356.0647867628. The cubic root of 28687430 is about 306.1238836537.

The spelling of 28687430 in words is "twenty-eight million, six hundred eighty-seven thousand, four hundred thirty".