28908423 has 24 divisors (see below), whose sum is σ = 42771456. Its totient is φ = 18810000.

The previous prime is 28908421. The next prime is 28908469. The reversal of 28908423 is 32480982.

It is not a de Polignac number, because 28908423 - 2¹ = 28908421 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28908421) 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, 115048 + ... + 115298.

It is an arithmetic number, because the mean of its divisors is an integer number (1782144).

Almost surely, 2^28908423 is an apocalyptic number.

28908423 is a deficient number, since it is larger than the sum of its proper divisors (13863033).

28908423 is a wasteful number, since it uses less digits than its factorization.

28908423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515 (or 512 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 28908423 is about 5376.6553729991. The cubic root of 28908423 is about 306.9079466675.

The spelling of 28908423 in words is "twenty-eight million, nine hundred eight thousand, four hundred twenty-three".