28701471 has 4 divisors (see below), whose sum is σ = 38268632. Its totient is φ = 19134312.

The previous prime is 28701469. The next prime is 28701479. The reversal of 28701471 is 17410782.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28701471 - 2¹ = 28701469 is a prime.

It is a super-3 number, since 3×28701471³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28701479) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4783576 + ... + 4783581.

It is an arithmetic number, because the mean of its divisors is an integer number (9567158).

Almost surely, 2^28701471 is an apocalyptic number.

28701471 is a deficient number, since it is larger than the sum of its proper divisors (9567161).

28701471 is an equidigital number, since it uses as much as digits as its factorization.

28701471 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9567160.

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 28701471 is about 5357.3753835250. The cubic root of 28701471 is about 306.1738193966.

The spelling of 28701471 in words is "twenty-eight million, seven hundred one thousand, four hundred seventy-one".