28951026019 has 4 divisors (see below), whose sum is σ = 29567005344. Its totient is φ = 28335046696.

The previous prime is 28951026011. The next prime is 28951026029. The reversal of 28951026019 is 91062015982.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28951026019 - 2³ = 28951026011 is a prime.

It is a super-2 number, since 2×28951026019² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28951026011) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 307989592 + ... + 307989685.

It is an arithmetic number, because the mean of its divisors is an integer number (7391751336).

Almost surely, 2^28951026019 is an apocalyptic number.

28951026019 is a deficient number, since it is larger than the sum of its proper divisors (615979325).

28951026019 is an equidigital number, since it uses as much as digits as its factorization.

28951026019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 615979324.

The product of its (nonzero) digits is 77760, while the sum is 43.

The spelling of 28951026019 in words is "twenty-eight billion, nine hundred fifty-one million, twenty-six thousand, nineteen".