28457475 has 12 divisors (see below), whose sum is σ = 47049816. Its totient is φ = 15177280.

The previous prime is 28457467. The next prime is 28457479. The reversal of 28457475 is 57475482.

It is not a de Polignac number, because 28457475 - 2³ = 28457467 is a prime.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (28457479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 189642 + ... + 189791.

It is an arithmetic number, because the mean of its divisors is an integer number (3920818).

Almost surely, 2^28457475 is an apocalyptic number.

28457475 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28457475 is a deficient number, since it is larger than the sum of its proper divisors (18592341).

28457475 is a wasteful number, since it uses less digits than its factorization.

28457475 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379446 (or 379441 counting only the distinct ones).

The product of its digits is 313600, while the sum is 42.

The square root of 28457475 is about 5334.5548080416. The cubic root of 28457475 is about 305.3037375518.

The spelling of 28457475 in words is "twenty-eight million, four hundred fifty-seven thousand, four hundred seventy-five".