28729894207 has 8 divisors (see below), whose sum is σ = 33634998432. Its totient is φ = 24024998400.

The previous prime is 28729894183. The next prime is 28729894217. The reversal of 28729894207 is 70249892782.

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 28729894207 - 2⁷ = 28729894079 is a prime.

It is a super-2 number, since 2×28729894207² (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 (28729894217) 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, 50051794 + ... + 50052367.

It is an arithmetic number, because the mean of its divisors is an integer number (4204374804).

Almost surely, 2^28729894207 is an apocalyptic number.

28729894207 is a deficient number, since it is larger than the sum of its proper divisors (4905104225).

28729894207 is a wasteful number, since it uses less digits than its factorization.

28729894207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100104209.

The product of its (nonzero) digits is 8128512, while the sum is 58.

The spelling of 28729894207 in words is "twenty-eight billion, seven hundred twenty-nine million, eight hundred ninety-four thousand, two hundred seven".