28423477 has 4 divisors (see below), whose sum is σ = 28847776. Its totient is φ = 27999180.

The previous prime is 28423459. The next prime is 28423513. The reversal of 28423477 is 77432482.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28423477 - 2⁷ = 28423349 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28423457) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 212049 + ... + 212182.

It is an arithmetic number, because the mean of its divisors is an integer number (7211944).

Almost surely, 2^28423477 is an apocalyptic number.

It is an amenable number.

28423477 is a deficient number, since it is larger than the sum of its proper divisors (424299).

28423477 is an equidigital number, since it uses as much as digits as its factorization.

28423477 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 424298.

The product of its digits is 75264, while the sum is 37.

The square root of 28423477 is about 5331.3672730361. The cubic root of 28423477 is about 305.1821074969.

It can be divided in two parts, 28423 and 477, that added together give a square (28900 = 170²).

The spelling of 28423477 in words is "twenty-eight million, four hundred twenty-three thousand, four hundred seventy-seven".