28961130387 has 8 divisors (see below), whose sum is σ = 44131246336. Its totient is φ = 16549217352.

The previous prime is 28961130383. The next prime is 28961130389. The reversal of 28961130387 is 78303116982.

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

It is not a de Polignac number, because 28961130387 - 2² = 28961130383 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28961130383) 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, 689550703 + ... + 689550744.

It is an arithmetic number, because the mean of its divisors is an integer number (5516405792).

Almost surely, 2^28961130387 is an apocalyptic number.

28961130387 is a deficient number, since it is larger than the sum of its proper divisors (15170115949).

28961130387 is a wasteful number, since it uses less digits than its factorization.

28961130387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1379101457.

The product of its (nonzero) digits is 435456, while the sum is 48.

The spelling of 28961130387 in words is "twenty-eight billion, nine hundred sixty-one million, one hundred thirty thousand, three hundred eighty-seven".