28477943 has 16 divisors (see below), whose sum is σ = 31570560. Its totient is φ = 25526496.

The previous prime is 28477937. The next prime is 28477961. The reversal of 28477943 is 34977482.

It is a cyclic number.

It is not a de Polignac number, because 28477943 - 2⁴ = 28477927 is a prime.

It is a super-2 number, since 2×28477943² = 1621986475022498, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28477894 and 28477903.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28477963) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 81896 + ... + 82242.

It is an arithmetic number, because the mean of its divisors is an integer number (1973160).

Almost surely, 2^28477943 is an apocalyptic number.

28477943 is a deficient number, since it is larger than the sum of its proper divisors (3092617).

28477943 is a wasteful number, since it uses less digits than its factorization.

28477943 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 526.

The product of its digits is 338688, while the sum is 44.

The square root of 28477943 is about 5336.4728988350. The cubic root of 28477943 is about 305.3769164420.

The spelling of 28477943 in words is "twenty-eight million, four hundred seventy-seven thousand, nine hundred forty-three".