28780190276 has 6 divisors (see below), whose sum is σ = 50365332990. Its totient is φ = 14390095136.

The previous prime is 28780190261. The next prime is 28780190281. The reversal of 28780190276 is 67209108782.

It can be written as a sum of positive squares in only one way, i.e., 14792397376 + 13987792900 = 121624^2 + 118270^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3597523781 + ... + 3597523788.

It is an arithmetic number, because the mean of its divisors is an integer number (8394222165).

Almost surely, 2^28780190276 is an apocalyptic number.

It is an amenable number.

28780190276 is a deficient number, since it is larger than the sum of its proper divisors (21585142714).

28780190276 is a wasteful number, since it uses less digits than its factorization.

28780190276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7195047573 (or 7195047571 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 50.

The spelling of 28780190276 in words is "twenty-eight billion, seven hundred eighty million, one hundred ninety thousand, two hundred seventy-six".