28771430 has 8 divisors (see below), whose sum is σ = 51788592. Its totient is φ = 11508568.

The previous prime is 28771373. The next prime is 28771439. The reversal of 28771430 is 3417782.

It is a happy number.

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

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 3 ways as a sum of consecutive naturals, for example, 1438562 + ... + 1438581.

It is an arithmetic number, because the mean of its divisors is an integer number (6473574).

Almost surely, 2^28771430 is an apocalyptic number.

28771430 is a deficient number, since it is larger than the sum of its proper divisors (23017162).

28771430 is a wasteful number, since it uses less digits than its factorization.

28771430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2877150.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 28771430 is about 5363.9006329350. The cubic root of 28771430 is about 306.4223808092.

It can be divided in two parts, 287 and 71430, that added together give a palindrome (71717).

The spelling of 28771430 in words is "twenty-eight million, seven hundred seventy-one thousand, four hundred thirty".