28423455 has 32 divisors (see below), whose sum is σ = 47113920. Its totient is φ = 14622720.

The previous prime is 28423453. The next prime is 28423457. The reversal of 28423455 is 55432482.

It is an interprime number because it is at equal distance from previous prime (28423453) and next prime (28423457).

It is not a de Polignac number, because 28423455 - 2¹ = 28423453 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28423453) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 69291 + ... + 69699.

It is an arithmetic number, because the mean of its divisors is an integer number (1472310).

Almost surely, 2^28423455 is an apocalyptic number.

28423455 is a deficient number, since it is larger than the sum of its proper divisors (18690465).

28423455 is a wasteful number, since it uses less digits than its factorization.

28423455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 571.

The product of its digits is 38400, while the sum is 33.

The square root of 28423455 is about 5331.3652097751. The cubic root of 28423455 is about 305.1820287590.

The spelling of 28423455 in words is "twenty-eight million, four hundred twenty-three thousand, four hundred fifty-five".