28990797087 has 8 divisors (see below), whose sum is σ = 44176452736. Its totient is φ = 16566169752.

The previous prime is 28990797083. The next prime is 28990797091. The reversal of 28990797087 is 78079709982.

It is an interprime number because it is at equal distance from previous prime (28990797083) and next prime (28990797091).

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

It is not a de Polignac number, because 28990797087 - 2² = 28990797083 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 (28990797083) 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, 690257053 + ... + 690257094.

It is an arithmetic number, because the mean of its divisors is an integer number (5522056592).

Almost surely, 2^28990797087 is an apocalyptic number.

28990797087 is a deficient number, since it is larger than the sum of its proper divisors (15185655649).

28990797087 is a wasteful number, since it uses less digits than its factorization.

28990797087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1380514157.

The product of its (nonzero) digits is 32006016, while the sum is 66.

The spelling of 28990797087 in words is "twenty-eight billion, nine hundred ninety million, seven hundred ninety-seven thousand, eighty-seven".