28487747397 has 8 divisors (see below), whose sum is σ = 38256927520. Its totient is φ = 18855199440.

The previous prime is 28487747377. The next prime is 28487747411. The reversal of 28487747397 is 79374778482.

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

It is not a de Polignac number, because 28487747397 - 2⁶ = 28487747333 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 (28487747347) 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, 34157554 + ... + 34158387.

It is an arithmetic number, because the mean of its divisors is an integer number (4782115940).

Almost surely, 2^28487747397 is an apocalyptic number.

It is an amenable number.

28487747397 is a deficient number, since it is larger than the sum of its proper divisors (9769180123).

28487747397 is a wasteful number, since it uses less digits than its factorization.

28487747397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 68316083.

The product of its digits is 132765696, while the sum is 66.

The spelling of 28487747397 in words is "twenty-eight billion, four hundred eighty-seven million, seven hundred forty-seven thousand, three hundred ninety-seven".