28602060781 has 4 divisors (see below), whose sum is σ = 32688069472. Its totient is φ = 24516052092.

The previous prime is 28602060731. The next prime is 28602060791. The reversal of 28602060781 is 18706020682.

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 not a de Polignac number, because 28602060781 - 2⁹ = 28602060269 is a prime.

It is a super-2 number, since 2×28602060781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28602060731) 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, 2043004335 + ... + 2043004348.

It is an arithmetic number, because the mean of its divisors is an integer number (8172017368).

Almost surely, 2^28602060781 is an apocalyptic number.

It is an amenable number.

28602060781 is a deficient number, since it is larger than the sum of its proper divisors (4086008691).

28602060781 is an equidigital number, since it uses as much as digits as its factorization.

28602060781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4086008690.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 28602060781 in words is "twenty-eight billion, six hundred two million, sixty thousand, seven hundred eighty-one".