28762002061 has 4 divisors (see below), whose sum is σ = 30974463772. Its totient is φ = 26549540352.

The previous prime is 28762002047. The next prime is 28762002083. The reversal of 28762002061 is 16020026782.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18788184900 + 9973817161 = 137070^2 + 99869^2 .

It is a cyclic number.

It is not a de Polignac number, because 28762002061 - 2⁵ = 28762002029 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 (28762002011) 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, 1106230836 + ... + 1106230861.

It is an arithmetic number, because the mean of its divisors is an integer number (7743615943).

Almost surely, 2^28762002061 is an apocalyptic number.

It is an amenable number.

28762002061 is a deficient number, since it is larger than the sum of its proper divisors (2212461711).

28762002061 is a wasteful number, since it uses less digits than its factorization.

28762002061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2212461710.

The product of its (nonzero) digits is 16128, while the sum is 34.

The spelling of 28762002061 in words is "twenty-eight billion, seven hundred sixty-two million, two thousand, sixty-one".