28780190275 has 12 divisors (see below), whose sum is σ = 35733867400. Its totient is φ = 22994196480.

The previous prime is 28780190261. The next prime is 28780190281. The reversal of 28780190275 is 57209108782.

It is not a de Polignac number, because 28780190275 - 2¹⁵ = 28780157507 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 729285 + ... + 767734.

Almost surely, 2^28780190275 is an apocalyptic number.

28780190275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

28780190275 is a deficient number, since it is larger than the sum of its proper divisors (6953677125).

28780190275 is a wasteful number, since it uses less digits than its factorization.

28780190275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1497798 (or 1497793 counting only the distinct ones).

The product of its (nonzero) digits is 564480, while the sum is 49.

The spelling of 28780190275 in words is "twenty-eight billion, seven hundred eighty million, one hundred ninety thousand, two hundred seventy-five".