28977423 has 16 divisors (see below), whose sum is σ = 39384576. Its totient is φ = 18947520.

The previous prime is 28977391. The next prime is 28977439. The reversal of 28977423 is 32477982.

It is not a de Polignac number, because 28977423 - 2⁵ = 28977391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28977023) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 67018 + ... + 67448.

It is an arithmetic number, because the mean of its divisors is an integer number (2461536).

Almost surely, 2^28977423 is an apocalyptic number.

28977423 is a deficient number, since it is larger than the sum of its proper divisors (10407153).

28977423 is a wasteful number, since it uses less digits than its factorization.

28977423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 814.

The product of its digits is 169344, while the sum is 42.

The square root of 28977423 is about 5383.0681771644. The cubic root of 28977423 is about 307.1519334823.

The spelling of 28977423 in words is "twenty-eight million, nine hundred seventy-seven thousand, four hundred twenty-three".