28070070493 has 4 divisors (see below), whose sum is σ = 28071973440. Its totient is φ = 28068167548.

The previous prime is 28070070437. The next prime is 28070070517. The reversal of 28070070493 is 39407007082.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 28070070493 - 2¹⁷ = 28069939421 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 (28070079493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 929173 + ... + 958906.

It is an arithmetic number, because the mean of its divisors is an integer number (7017993360).

Almost surely, 2^28070070493 is an apocalyptic number.

It is an amenable number.

28070070493 is a deficient number, since it is larger than the sum of its proper divisors (1902947).

28070070493 is a wasteful number, since it uses less digits than its factorization.

28070070493 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1902946.

The product of its (nonzero) digits is 84672, while the sum is 40.

The spelling of 28070070493 in words is "twenty-eight billion, seventy million, seventy thousand, four hundred ninety-three".