28978190439 has 8 divisors (see below), whose sum is σ = 42150095232. Its totient is φ = 17562539640.

The previous prime is 28978190341. The next prime is 28978190459. The reversal of 28978190439 is 93409187982.

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

It is not a de Polignac number, because 28978190439 - 2¹⁷ = 28978059367 is a prime.

It is a super-2 number, since 2×28978190439² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28978190459) 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, 439063459 + ... + 439063524.

It is an arithmetic number, because the mean of its divisors is an integer number (5268761904).

Almost surely, 2^28978190439 is an apocalyptic number.

28978190439 is a deficient number, since it is larger than the sum of its proper divisors (13171904793).

28978190439 is a wasteful number, since it uses less digits than its factorization.

28978190439 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878126997.

The product of its (nonzero) digits is 7838208, while the sum is 60.

The spelling of 28978190439 in words is "twenty-eight billion, nine hundred seventy-eight million, one hundred ninety thousand, four hundred thirty-nine".