28406375 has 8 divisors (see below), whose sum is σ = 35451312. Its totient is φ = 22725000.

The previous prime is 28406369. The next prime is 28406383. The reversal of 28406375 is 57360482.

It is a happy number.

It is not a de Polignac number, because 28406375 - 2¹⁶ = 28340839 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 7 ways as a sum of consecutive naturals, for example, 113501 + ... + 113750.

It is an arithmetic number, because the mean of its divisors is an integer number (4431414).

Almost surely, 2^28406375 is an apocalyptic number.

28406375 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28406375 is a deficient number, since it is larger than the sum of its proper divisors (7044937).

28406375 is an equidigital number, since it uses as much as digits as its factorization.

28406375 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 227266 (or 227256 counting only the distinct ones).

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 28406375 is about 5329.7631279448. The cubic root of 28406375 is about 305.1208873122.

The spelling of 28406375 in words is "twenty-eight million, four hundred six thousand, three hundred seventy-five".