28658475 has 24 divisors (see below), whose sum is σ = 52647920. Its totient is φ = 15284160.

The previous prime is 28658473. The next prime is 28658491. The reversal of 28658475 is 57485682.

It is not a de Polignac number, because 28658475 - 2¹ = 28658473 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 28658475.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28658473) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 20554 + ... + 21903.

Almost surely, 2^28658475 is an apocalyptic number.

28658475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28658475 is a deficient number, since it is larger than the sum of its proper divisors (23989445).

28658475 is a wasteful number, since it uses less digits than its factorization.

28658475 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42476 (or 42465 counting only the distinct ones).

The product of its digits is 537600, while the sum is 45.

The square root of 28658475 is about 5353.3610937429. The cubic root of 28658475 is about 306.0208559410.

It can be divided in two parts, 28 and 658475, that added together give a cube (658503 = 87³).

The spelling of 28658475 in words is "twenty-eight million, six hundred fifty-eight thousand, four hundred seventy-five".