28511963 has 2 divisors, whose sum is σ = 28511964. Its totient is φ = 28511962.

The previous prime is 28511929. The next prime is 28511993. The reversal of 28511963 is 36911582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28511963 - 2¹² = 28507867 is a prime.

It is a super-2 number, since 2×28511963² = 1625864068226738, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (28511993) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14255981 + 14255982.

It is an arithmetic number, because the mean of its divisors is an integer number (14255982).

Almost surely, 2^28511963 is an apocalyptic number.

28511963 is a deficient number, since it is larger than the sum of its proper divisors (1).

28511963 is an equidigital number, since it uses as much as digits as its factorization.

28511963 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12960, while the sum is 35.

The square root of 28511963 is about 5339.6594460696. The cubic root of 28511963 is about 305.4984700311.

The spelling of 28511963 in words is "twenty-eight million, five hundred eleven thousand, nine hundred sixty-three".