28980331 has 2 divisors, whose sum is σ = 28980332. Its totient is φ = 28980330.

The previous prime is 28980313. The next prime is 28980349. The reversal of 28980331 is 13308982.

Together with previous prime (28980313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a balanced prime because it is at equal distance from previous prime (28980313) and next prime (28980349).

It is a cyclic number.

It is not a de Polignac number, because 28980331 - 2¹¹ = 28978283 is a prime.

It is a super-2 number, since 2×28980331² = 1679719169739122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28980131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14490165 + 14490166.

It is an arithmetic number, because the mean of its divisors is an integer number (14490166).

Almost surely, 2^28980331 is an apocalyptic number.

28980331 is a deficient number, since it is larger than the sum of its proper divisors (1).

28980331 is an equidigital number, since it uses as much as digits as its factorization.

28980331 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10368, while the sum is 34.

The square root of 28980331 is about 5383.3382765715. The cubic root of 28980331 is about 307.1622077793.

The spelling of 28980331 in words is "twenty-eight million, nine hundred eighty thousand, three hundred thirty-one".