28477429 has 2 divisors, whose sum is σ = 28477430. Its totient is φ = 28477428.

The previous prime is 28477417. The next prime is 28477439. The reversal of 28477429 is 92477482.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24059025 + 4418404 = 4905^2 + 2102^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28477429 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28477439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14238714 + 14238715.

It is an arithmetic number, because the mean of its divisors is an integer number (14238715).

Almost surely, 2^28477429 is an apocalyptic number.

It is an amenable number.

28477429 is a deficient number, since it is larger than the sum of its proper divisors (1).

28477429 is an equidigital number, since it uses as much as digits as its factorization.

28477429 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 225792, while the sum is 43.

The square root of 28477429 is about 5336.4247394674. The cubic root of 28477429 is about 305.3750791759.

The spelling of 28477429 in words is "twenty-eight million, four hundred seventy-seven thousand, four hundred twenty-nine".