28771429 has 8 divisors (see below), whose sum is σ = 31173120. Its totient is φ = 26448576.

The previous prime is 28771373. The next prime is 28771439. The reversal of 28771429 is 92417782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28771429 - 2¹³ = 28763237 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28771391 and 28771400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28771439) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 18949 + ... + 20410.

It is an arithmetic number, because the mean of its divisors is an integer number (3896640).

Almost surely, 2^28771429 is an apocalyptic number.

It is an amenable number.

28771429 is a deficient number, since it is larger than the sum of its proper divisors (2401691).

28771429 is a wasteful number, since it uses less digits than its factorization.

28771429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39419.

The product of its digits is 56448, while the sum is 40.

The square root of 28771429 is about 5363.9005397192. The cubic root of 28771429 is about 306.4223772591.

The spelling of 28771429 in words is "twenty-eight million, seven hundred seventy-one thousand, four hundred twenty-nine".