28721794414 has 8 divisors (see below), whose sum is σ = 43139307168. Its totient is φ = 14342025360.

The previous prime is 28721794403. The next prime is 28721794421. The reversal of 28721794414 is 41449712782.

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 an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9434022 + ... + 9437065.

It is an arithmetic number, because the mean of its divisors is an integer number (5392413396).

Almost surely, 2^28721794414 is an apocalyptic number.

28721794414 is a deficient number, since it is larger than the sum of its proper divisors (14417512754).

28721794414 is a wasteful number, since it uses less digits than its factorization.

28721794414 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18871850.

The product of its digits is 903168, while the sum is 49.

The spelling of 28721794414 in words is "twenty-eight billion, seven hundred twenty-one million, seven hundred ninety-four thousand, four hundred fourteen".