28749767397 has 8 divisors (see below), whose sum is σ = 41281717344. Its totient is φ = 17692164528.

The previous prime is 28749767377. The next prime is 28749767411. The reversal of 28749767397 is 79376794782.

It is a happy number.

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

It is not a de Polignac number, because 28749767397 - 2¹⁰ = 28749766373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28749767377) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 368586723 + ... + 368586800.

It is an arithmetic number, because the mean of its divisors is an integer number (5160214668).

Almost surely, 2^28749767397 is an apocalyptic number.

It is an amenable number.

28749767397 is a deficient number, since it is larger than the sum of its proper divisors (12531949947).

28749767397 is a wasteful number, since it uses less digits than its factorization.

28749767397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 737173539.

The product of its digits is 224042112, while the sum is 69.

The spelling of 28749767397 in words is "twenty-eight billion, seven hundred forty-nine million, seven hundred sixty-seven thousand, three hundred ninety-seven".