928780231 has 2 divisors, whose sum is σ = 928780232. Its totient is φ = 928780230.

The previous prime is 928780201. The next prime is 928780277. The reversal of 928780231 is 132087829.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 928780231 - 2¹⁹ = 928255943 is a prime.

It is a super-2 number, since 2×928780231² = 1725265434992826722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (928780201) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 464390115 + 464390116.

It is an arithmetic number, because the mean of its divisors is an integer number (464390116).

Almost surely, 2^928780231 is an apocalyptic number.

928780231 is a deficient number, since it is larger than the sum of its proper divisors (1).

928780231 is an equidigital number, since it uses as much as digits as its factorization.

928780231 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48384, while the sum is 40.

The square root of 928780231 is about 30475.8959015153. The cubic root of 928780231 is about 975.6730766867.

The spelling of 928780231 in words is "nine hundred twenty-eight million, seven hundred eighty thousand, two hundred thirty-one".