28415143 has 8 divisors (see below), whose sum is σ = 31395168. Its totient is φ = 25580544.

The previous prime is 28415117. The next prime is 28415147. The reversal of 28415143 is 34151482.

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 28415143 - 2¹⁷ = 28284071 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28415147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 35946 + ... + 36727.

It is an arithmetic number, because the mean of its divisors is an integer number (3924396).

Almost surely, 2^28415143 is an apocalyptic number.

28415143 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28415143 is a deficient number, since it is larger than the sum of its proper divisors (2980025).

28415143 is a wasteful number, since it uses less digits than its factorization.

28415143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72713.

The product of its digits is 3840, while the sum is 28.

The square root of 28415143 is about 5330.5856151083. The cubic root of 28415143 is about 305.1522772700.

The spelling of 28415143 in words is "twenty-eight million, four hundred fifteen thousand, one hundred forty-three".